Statement of Financial Position (Parentheticals) $ in Millions |
Sep. 30, 2021
USD ($)
shares
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Dec. 31, 2020
USD ($)
shares
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Statement of Financial Position [Abstract] | ||
Available for sale, at amortized cost | $ 89,335 | $ 85,188 |
Debt Securities, Available-for-sale, Allowance for Credit Loss | 12 | 20 |
Held to maturity, Fair Value | 11,119 | 12,510 |
Debt Securities, Held-to-maturity, Allowance for Credit Loss | 35 | 44 |
short-term investments amortized cost | 3,529 | 4,349 |
Premium Receivable, Allowance for Credit Loss | 42 | 44 |
Reinsurance Recoverable, Allowance for Credit Loss | $ 325 | $ 314 |
Common Shares in treasury, shares | shares | 43,144,862 | 26,872,639 |
Common Shares, shares issued | shares | 474,021,114 | 477,605,264 |
Common Shares, shares outstanding | shares | 430,876,252 | 450,732,625 |
Consolidated Statements of Operations and Comprehensive Income (Parentheticals) - USD ($) $ in Millions |
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Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
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Income Statement [Abstract] | ||||
Total net realized gains (losses) reclassified from AOCI | $ (10) | $ 49 | $ 26 | $ (303) |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax | $ (3) | $ 7 | $ (5) | $ (35) |
General |
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Organization, Consolidation and Presentation of Financial Statements [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
General | General a) Basis of presentation Chubb Limited is a holding company incorporated in Zurich, Switzerland. Chubb Limited, through its subsidiaries, provides a broad range of insurance and reinsurance products to insureds worldwide. Our results are reported through the following business segments: North America Commercial P&C Insurance, North America Personal P&C Insurance, North America Agricultural Insurance, Overseas General Insurance, Global Reinsurance, and Life Insurance. Refer to Note 12 for additional information. The interim unaudited consolidated financial statements, which include the accounts of Chubb Limited and its subsidiaries (collectively, Chubb, we, us, or our), have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) and, in the opinion of management, reflect all adjustments necessary for a fair statement of the results and financial position for such periods. All significant intercompany accounts and transactions, including internal reinsurance transactions, have been eliminated. The results of operations and cash flows for any interim period are not necessarily indicative of the results for the full year. These consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in our 2020 Form 10-K. b) Restricted cash Restricted cash in the Consolidated balance sheets represents amounts held for the benefit of third parties and is legally or contractually restricted as to withdrawal or usage. Amounts include deposits with U.S. and non-U.S. regulatory authorities, trust funds set up for the benefit of ceding companies, and amounts pledged as collateral to meet financing arrangements. The following table provides a reconciliation of cash and restricted cash reported within the Consolidated balance sheets that total to the amounts shown in the Consolidated statements of cash flows:
c) Goodwill During the nine months ended September 30, 2021, Goodwill decreased $13 million, reflecting the impact of foreign exchange. d) Accounting guidance not yet adopted Targeted Improvements to the Accounting for Long-Duration Contracts In August 2018, the FASB issued guidance to improve the existing recognition, measurement, presentation, and disclosure requirements for long-duration contracts issued by an insurance entity. The amendments in this update require more frequent updating of assumptions and a standardized discount rate for the future policy benefit liability, a requirement to use the fair value measurement model for policies with market risk benefits, simplified amortization of deferred acquisition costs, and enhanced disclosures. This standard will be effective in the first quarter of 2023 with early adoption permitted. We are currently assessing the effect of adopting this guidance on our financial condition and results of operations. We will be better able to quantify the effect of adopting this standard as we progress in our implementation process and draw nearer to the date of adoption.
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Acquisitions |
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Sep. 30, 2021 | |
Business Combinations [Abstract] | |
Acquisitions | Acquisitions Cigna’s Life and Accident and Health (A&H) Insurance Business in Asia-Pacific Markets On October 7, 2021, we entered into a definitive agreement to acquire the life and non-life insurance companies that house the personal accident, supplemental health and life insurance business of Cigna in seven Asia-Pacific markets, including Korea, Taiwan, New Zealand, Thailand, Hong Kong and Indonesia and its interest in a joint venture in Turkey, for $5.75 billion in cash. The transaction is expected to be completed in 2022. The timing of completion is subject to required regulatory approvals and customary closing conditions. Huatai Group Chubb maintains a direct investment in Huatai Insurance Group Co., Ltd. (Huatai Group). Huatai Group is the parent company of, and owns 100 percent of, Huatai Property & Casualty Insurance Co., Ltd. (Huatai P&C), approximately 80 percent of Huatai Life Insurance Co., Ltd. (Huatai Life), and approximately 82 percent of Huatai Asset Management Co., Ltd. (collectively, Huatai). Huatai Group's insurance operations have more than 600 branches and 17 million customers in China. In November 2020, we completed the purchase of an incremental 0.9 percent ownership interest in Huatai Group for approximately $65 million, which was paid in January 2021. As of September 30, 2021, Chubb's aggregate ownership interest in Huatai Group was approximately 47.1 percent. Chubb applies the equity method of accounting to its investment in Huatai Group by recording its share of net income or loss in Other (income) expense in the Consolidated statements of operations. In 2019, Chubb entered into an agreement to acquire an additional 7.1 percent ownership interest in Huatai Group. In July 2021, Chubb signed an agreement of intent to purchase an additional 6.4 percent ownership interest in Huatai Group. In connection with the agreement, Chubb paid a deposit of approximately $143 million. The purchase of the additional ownership interests is contingent upon important conditions. As Chubb’s ownership interest increases, we will continue to evaluate the appropriateness of consolidation accounting in accordance with the Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) 810, Consolidation, and other applicable regulations.
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Investments |
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Investments, Debt and Equity Securities [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Investments | Investments a) Fixed maturities
The following table presents the amortized cost of our Held to Maturity (HTM) securities according to S&P rating:
The following table presents fixed maturities by contractual maturity:
Expected maturities could differ from contractual maturities because borrowers may have the right to call or prepay obligations, with or without call or prepayment penalties. b) Gross unrealized loss Fixed maturities in an unrealized loss position at September 30, 2021 comprised both investment grade and below investment grade securities for which fair value declined primarily due to widening credit spreads since the date of purchase. The following tables present, for Available for Sale (AFS) fixed maturities in an unrealized loss position (including securities on loan) that are not deemed to have expected credit losses, the aggregate fair value and gross unrealized loss by length of time the security has continuously been in an unrealized loss position:
c) Net realized gains (losses) The following table presents the components of Net realized gains (losses):
(1)Relates to certain securities we intended to sell and securities written to market entering default. Realized gains and losses from Equity securities and Other investments from the table above include sales of securities and unrealized gains and losses from fair value changes as follows:
The following table presents a roll-forward of valuation allowance for expected credit losses on fixed maturities:
d) Alternative investments Alternative investments include partially-owned investment companies, investment funds, and limited partnerships measured at fair value using net asset value (NAV) as a practical expedient. The following table presents, by investment category, the expected liquidation period, fair value, and maximum future funding commitments of alternative investments:
Included in all categories in the above table, except for Investment funds, are investments for which Chubb will never have the contractual option to redeem but receives distributions based on the liquidation of the underlying assets. Further, for all categories except for Investment funds, Chubb does not have the ability to sell or transfer the investments without the consent from the general partner of individual funds.
Investment funds employ various investment strategies, such as long/short equity and arbitrage/distressed. Included in this category are investments for which Chubb has the option to redeem at agreed upon value as described in each investment fund’s subscription agreement. Depending on the terms of the various subscription agreements, investment fund investments may be redeemed monthly, quarterly, semi-annually, or annually. If Chubb wishes to redeem an investment fund investment, it must first determine if the investment fund is still in a lock-up period (a time when Chubb cannot redeem its investment so that the investment fund manager has time to build the portfolio). If the investment fund is no longer in its lock-up period, Chubb must then notify the investment fund manager of its intention to redeem by the notification date prescribed by the subscription agreement. Subsequent to notification, the investment fund can redeem Chubb’s investment within several months of the notification. Notice periods for redemption of the investment funds are up to 270 days. Chubb can redeem its investment funds without consent from the investment fund managers. e) Restricted assets Chubb is required to maintain assets on deposit with various regulatory authorities to support its insurance and reinsurance operations. These requirements are generally promulgated in the statutory regulations of the individual jurisdictions. The assets on deposit are available to settle insurance and reinsurance liabilities. Chubb is also required to restrict assets pledged under repurchase agreements, which represent Chubb's agreement to sell securities and repurchase them at a future date for a predetermined price. We use trust funds in certain large reinsurance transactions where the trust funds are set up for the benefit of the ceding companies and generally take the place of letter of credit (LOC) requirements. We have investments in segregated portfolios primarily to provide collateral or guarantees for LOC and derivative transactions. Included in restricted assets at September 30, 2021 and December 31, 2020 are investments, primarily fixed maturities, totaling $18.82 billion and $19.61 billion, respectively, and cash of $176 million and $89 million, respectively. The following table presents the components of restricted assets:
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Fair value measurements |
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Fair Value Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Fair value measurements | Fair value measurements a) Fair value hierarchy Fair value of financial assets and financial liabilities is estimated based on the framework established in the fair value accounting guidance. The guidance defines fair value as the price to sell an asset or transfer a liability (an exit price) in an orderly transaction between market participants and establishes a three-level valuation hierarchy based on the reliability of the inputs. The fair value hierarchy gives the highest priority to quoted prices in active markets and the lowest priority to unobservable data. The three levels of the hierarchy are as follows: •Level 1 – Unadjusted quoted prices for identical assets or liabilities in active markets; •Level 2 – Includes, among other items, inputs other than quoted prices that are observable for the asset or liability such as interest rates and yield curves, quoted prices for similar assets and liabilities in active markets, and quoted prices for identical or similar assets and liabilities in markets that are not active; and •Level 3 – Inputs that are unobservable and reflect management’s judgments about assumptions that market participants would use in pricing an asset or liability. We categorize financial instruments within the valuation hierarchy at the balance sheet date based upon the lowest level of inputs that are significant to the fair value measurement. We use pricing services to obtain fair value measurements for the majority of our investment securities. Based on management’s understanding of the methodologies used, these pricing services only produce an estimate of fair value if there is observable market information that would allow them to make a fair value estimate. Based on our understanding of the market inputs used by the pricing services, all applicable investments have been valued in accordance with GAAP. We do not adjust prices obtained from pricing services. The following is a description of the valuation techniques and inputs used to determine fair values for financial instruments carried at fair value, as well as the general classification of such financial instruments pursuant to the valuation hierarchy. Fixed maturities We use pricing services to estimate fair value measurements for the majority of our fixed maturities. The pricing services use market quotations for fixed maturities that have quoted prices in active markets; such securities are classified within Level 1. For fixed maturities other than U.S. Treasury securities that generally do not trade on a daily basis, the pricing services prepare estimates of fair value measurements using their pricing applications or pricing models, which include available relevant market information, benchmark curves, benchmarking of like securities, sector groupings, and matrix pricing. Additional valuation factors that can be taken into account are nominal spreads, dollar basis, and liquidity adjustments. The pricing services evaluate each asset class based on relevant market and credit information, perceived market movements, and sector news. The market inputs used in the pricing evaluation, listed in the approximate order of priority include: benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, reference data, and industry and economic events. The extent of the use of each input is dependent on the asset class and the market conditions. Given the asset class, the priority of the use of inputs may change, or some market inputs may not be relevant. Additionally, fixed maturities valuation is more subjective when markets are less liquid due to the lack of market based inputs (i.e., stale pricing) and may require the use of models to be priced. The lack of market based inputs may increase the potential that an investment's estimated fair value is not reflective of the price at which an actual transaction would occur. The overwhelming majority of fixed maturities are classified within Level 2 because the most significant inputs used in the pricing techniques are observable. For a small number of fixed maturities, we obtain a single broker quote (typically from a market maker). Due to the disclaimers on the quotes that indicate that the price is indicative only, we include these fair value estimates in Level 3. Equity securities Equity securities with active markets are classified within Level 1 as fair values are based on quoted market prices. For equity securities in markets which are less active, fair values are based on market valuations and are classified within Level 2. Equity securities for which pricing is unobservable are classified within Level 3. Short-term investments Short-term investments, which comprise securities due to mature within one year of the date of purchase that are traded in active markets, are classified within Level 1 as fair values are based on quoted market prices. Securities such as commercial paper and discount notes are classified within Level 2 because these securities are typically not actively traded due to their approaching maturity, and as such, their cost approximates fair value. Short-term investments for which pricing is unobservable are classified within Level 3. Other investments Fair values for the majority of Other investments including investments in partially-owned investment companies, investment funds, and limited partnerships are based on their respective net asset values or equivalent (NAV) and are excluded from the fair value hierarchy table below. Certain of our long-duration contracts are supported by assets that do not qualify for separate account reporting under GAAP. These assets comprise mutual funds, classified within Level 1 in the valuation hierarchy on the same basis as other equity securities traded in active markets. Other investments also include equity securities, classified within Level 1 and fixed maturities, classified within Level 2, held in rabbi trusts maintained by Chubb for deferred compensation plans and supplemental retirement plans and are classified within the valuation hierarchy on the same basis as other equity securities and fixed maturities. Securities lending collateral The underlying assets included in Securities lending collateral in the Consolidated balance sheets are fixed maturities which are classified in the valuation hierarchy on the same basis as other fixed maturities. Excluded from the valuation hierarchy is the corresponding liability related to Chubb’s obligation to return the collateral plus interest as it is reported at contract value and not fair value in the Consolidated balance sheets. Investment derivative instruments Actively traded investment derivative instruments, including futures, options, and forward contracts are classified within Level 1 as fair values are based on quoted market prices. The fair value of cross-currency swaps and interest rate swaps is based on market valuations and is classified within Level 2. Investment derivative instruments are recorded in either Other assets or Accounts payable, accrued expenses, and other liabilities in the Consolidated balance sheets. Other derivative instruments We maintain positions in exchange-traded equity futures contracts designed to limit exposure to a severe equity market decline, which would cause an increase in expected claims and, therefore, an increase in future policy benefit reserves for our guaranteed minimum death benefits (GMDB) and an increase in the fair value liability for our guaranteed living benefits (GLB) reinsurance business. Our positions in exchange-traded equity futures contracts are classified within Level 1. The fair value of the majority of the remaining positions in other derivative instruments is based on significant observable inputs including equity security and interest rate indices. Accordingly, these are classified within Level 2. Other derivative instruments based on unobservable inputs are classified within Level 3. Other derivative instruments are recorded in either Other assets or Accounts payable, accrued expenses, and other liabilities in the Consolidated balance sheets. Separate account assets Separate account assets represent segregated funds where investment risks are borne by the customers, except to the extent of certain guarantees made by Chubb. Separate account assets comprise mutual funds classified within Level 1 in the valuation hierarchy on the same basis as other equity securities traded in active markets. Separate account assets also include fixed maturities classified within Level 2 because the most significant inputs used in the pricing techniques are observable. Excluded from the valuation hierarchy are the corresponding liabilities as they are reported at contract value and not fair value in the Consolidated balance sheets. Separate account assets are recorded in Other assets in the Consolidated balance sheets. Guaranteed living benefits The GLB arises from life reinsurance programs covering living benefit guarantees whereby we assume the risk of guaranteed minimum income benefits (GMIB) associated with variable annuity contracts. GLB’s are recorded in Accounts payable, accrued expenses, and other liabilities in the Consolidated balance sheets. For GLB reinsurance, Chubb estimates fair value using an internal valuation model which includes current market information and estimates of policyholder behavior. All of the treaties contain claim limits, which are factored into the valuation model. The fair value depends on a number of factors, including interest rates, equity markets, credit risk, current account value, market volatility, expected annuitization rates and other policyholder behavior, and changes in policyholder mortality. Because of the significant use of unobservable inputs including policyholder behavior, GLB reinsurance is classified within Level 3. Financial instruments measured at fair value on a recurring basis, by valuation hierarchy
(1)Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of $9,768 million, policy loans of $235 million and other investments of $80 million at September 30, 2021 measured using NAV as a practical expedient. (2)Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value.
(1)Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of $6,770 million, policy loans of $233 million and other investments of $60 million at December 31, 2020 measured using NAV as a practical expedient. (2)Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Level 3 financial instruments The following table presents the significant unobservable inputs used in the Level 3 liability valuations. Excluded from the table below are inputs used to determine the fair value of Level 3 assets which are based on single broker quotes and contain no quantitative unobservable inputs developed by management. The majority of our fixed maturities classified as Level 3 used external pricing when markets are less liquid due to the lack of market inputs (i.e., stale pricing, broker quotes).
(1)The weighted average lapse and annuitization rates are determined by weighting each treaty's rates by the GLB contracts fair value. The most significant policyholder behavior assumptions include lapse rates and the GMIB annuitization rates. Assumptions regarding lapse rates and GMIB annuitization rates differ by treaty, but the underlying methodologies to determine rates applied to each treaty are comparable. A lapse rate is the percentage of in-force policies surrendered in a given calendar year. All else equal, as lapse rates increase, ultimate claim payments will decrease. The GMIB annuitization rate is the percentage of policies for which the policyholder will elect to annuitize using the guaranteed benefit provided under the GMIB. All else equal, as GMIB annuitization rates increase, ultimate claim payments will increase, subject to treaty claim limits. The effect of changes in key market factors on assumed lapse and annuitization rates reflect emerging trends using data available from cedants. For treaties with limited experience, rates are established in line with data received from other ceding companies adjusted, as appropriate, with industry estimates. The model and related assumptions are regularly re-evaluated by management and enhanced, as appropriate, based upon additional experience obtained related to policyholder behavior and availability of updated information such as market conditions, market participant assumptions, and demographics of in-force annuities. For the three and nine months ended September 30, 2021 and 2020, no material refinements were made to the model. For detailed information on our lapse and annuitization rate assumptions, refer to Note 4 to the Consolidated Financial Statements of our 2020 Form 10-K. The following tables present a reconciliation of the beginning and ending balances of financial instruments measured at fair value using significant unobservable inputs (Level 3):
(1)Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value.
(1)Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value.
(1)Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value.
(1)Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. b) Financial instruments disclosed, but not measured, at fair value Chubb uses various financial instruments in the normal course of its business. Our insurance contracts are excluded from fair value of financial instruments accounting guidance, and therefore, are not included in the amounts discussed below. The carrying values of cash, other assets, other liabilities, and other financial instruments not included below approximated their fair values. Refer to the 2020 Form 10-K for information on the fair value methods and assumptions for investments in partially-owned insurance companies, short-term and long-term debt, repurchase agreements, and trust-preferred securities. The following tables present fair value, by valuation hierarchy, and carrying value of the financial instruments not measured at fair value:
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Reinsurance (Notes) |
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Reinsurance Disclosures [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reinsurance [Text Block] | Reinsurance Reinsurance recoverable on ceded reinsurance
(1)Net of valuation allowance for uncollectible reinsurance. The increase in reinsurance recoverable on losses and loss expenses was primarily due to higher underlying ceded exposures due to premium growth, unfavorable prior period development in certain lines, crop activity, and catastrophe losses. The following table presents a roll-forward of valuation allowance for uncollectible reinsurance related to Reinsurance recoverable on loss and loss expenses:
For additional information, refer to Note 1 d) to the Consolidated Financial Statements of our 2020 Form 10-K.
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Unpaid losses and loss expenses |
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Liability for Claims and Claims Adjustment Expense [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block] | Unpaid losses and loss expenses The following table presents a reconciliation of beginning and ending Unpaid losses and loss expenses:
(1) Net of valuation allowance for uncollectible reinsurance. (2) Relates to prior period loss reserve development only and excludes prior period development related to reinstatement premiums, expense adjustments and earned premiums totaling $87 million and $23 million for the nine months ended September 30, 2021 and 2020, respectively. Gross and net unpaid losses and loss expenses increased $4,820 million and $3,917 million, respectively, for the nine months ended September 30, 2021, driven by an increase in underlying exposure due to premium growth, crop activity, and net catastrophe losses incurred, partially offset by favorable prior period development. Prior Period Development Prior period development (PPD) arises from changes to loss estimates recognized in the current year that relate to loss events that occurred in previous calendar years and excludes the effect of losses from the development of earned premium from previous accident years. Long-tail lines include lines such as workers' compensation, general liability, and professional liability; while short-tail lines include lines such as most property lines, energy, personal accident, and agriculture. The following table summarizes (favorable) and adverse PPD by segment.
Significant prior period movements by segment, principally driven by reserve reviews completed during each respective period, are discussed in more detail below. The remaining net development for long-tail lines and short-tail business for each segment and Corporate comprises numerous favorable and adverse movements across a number of lines and accident years, none of which is significant individually or in the aggregate. North America Commercial P&C Insurance 2021 For the three months ended September 30, 2021, net favorable PPD was $157 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes: •Net favorable development of $101 million in long-tail business, primarily from: •Net favorable development of $97 million in our workers' compensation business mainly impacting accident years 2016 and prior, driven by lower than expected loss experience, and related improvements in loss development factors; •Net favorable development of $36 million on large multi-line prospective deals in the 2017 and prior accident years, due to lower than expected reported loss activity. These structured deals typically cover large clients for multiple product lines and with varying loss limitations; this development is net of premium returns of $46 million tied to the loss performance of the particular deals; and •Net adverse development of $31 million in commercial excess and umbrella portfolios, mainly in accident years 2018 and 2019, driven by higher than expected reported loss activity. •Net favorable development of $56 million in short-tail business, primarily from: •Net favorable development of $54 million in our property and marine portfolios, mainly in accident years 2019 and 2020, which experienced lower than expected loss development on catastrophe and non-catastrophe losses. For the nine months ended September 30, 2021, net favorable PPD was $440 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes: •Net favorable development of $243 million in long-tail business, primarily from: •Net favorable development of $255 million in our workers’ compensation business. This included favorable development of $36 million related to our annual assessment of multi-claimant events including industrial accidents, in the 2020 accident year. Consistent with prior years, we reviewed these potential exposures after the close of the accident year to allow for late reporting or identification of significant losses. The remaining overall favorable development was mainly in accident years 2016 and prior, driven by lower than expected loss experience and related improvements to loss development factors; •Net favorable development of $51 million in professional liability (errors & omissions and cyber), driven by accident years 2016 and 2017, from lower than expected emergence, partly offset by higher than expected development in accident year 2019; •Net favorable development of $40 million in voluntary environmental lines, driven by accident years 2017 and prior, from lower than expected emergence, partly offset by higher than expected development in accident year 2019; •Net favorable development of $37 million in general liability portfolios, driven by lower than expected paid and reported case incurred activity in accident years 2017 and prior, partly offset by higher than expected reported case incurred activity in accident years 2018 and 2019; •Net favorable development of $36 million on large multi-line prospective deals due to the same factors experienced for the three months ended September 30, 2021, as described above; •Net adverse development of $26 million in high deductible general liability coverages, driven by higher than expected loss severities, mainly impacting accident years 2016 through 2020, partly offset by favorable loss development in older accident years; •Net adverse development of $74 million in commercial automobile liability, driven by adverse reported loss experience, mainly impacting accident years 2017 and 2019; and •Net adverse development of $74 million in commercial excess and umbrella portfolios, with accident years 2016 through 2019 experiencing higher than expected reported loss activity, partly offset by lower than expected emergence in accident years 2015 and prior. •Net favorable development of $197 million in short-tail business, primarily from: •Net favorable development of $89 million in surety, mainly in accident years 2018 through 2020, driven by lower than expected loss emergence; •Net favorable development of $83 million in property and marine coverages mainly in accident years 2019 and 2020, driven by lower than expected loss development; •Net favorable development of $46 million in accident and health, mainly in accident years 2019 and 2020, where loss emergence was lower than expected; and •Net adverse development of $41 million in first-party cyber risk, driven by accident years 2019 and 2020, which experienced higher than expected loss development as well as heightened frequency and severity. 2020 For the three months ended September 30, 2020, net favorable PPD was $200 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes: •Net favorable development of $255 million in long-tail business, primarily from: •Net favorable development of $155 million in workers' compensation business mainly impacting accident years 2016 and prior, driven by lower than expected paid and reported loss activity, and related updates to loss development factors, partly offset by adverse development in accident year 2019; •Net favorable development of $47 million in commercial excess and umbrella portfolios, driven by accident years 2014 and prior, and accident year 2019. The 2014 and prior development was a function of lower than expected paid and reported loss activity. The development on the 2019 accident year relates to three large policies covering specific perils, which expired in the quarter, with no covered events occurring; •Net favorable development of $41 million on large multi-line prospective deals in the 2016 and prior accident years, due to lower than expected reported loss activity. These structured deals typically cover large clients for multiple product lines and with varying loss limitations; this development is net of premium returns of $26 million tied to the loss performance of the particular deals; •Net favorable development of $40 million in our foreign casualty business, mainly in accident year 2016, due to lower than expected reported loss activity, partly offset by a large loss in accident year 2017; and •Net adverse development of $29 million in assumed general liability and excess lines mainly in accident years 2016 and prior due to higher than expected reported loss activity. •Net adverse development of $55 million in short-tail business, primarily from: •Net adverse development of $35 million in our property portfolios, due to adverse non-catastrophe loss development mainly in accident year 2019, partially offset by favorable catastrophe-driven loss experience; and •Net adverse development of $21 million in our marine portfolios, mainly impacting the 2019 accident year, driven by higher than expected non-catastrophe loss development. For the nine months ended September 30, 2020, net favorable PPD was $451 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes: •Net favorable development of $439 million in long-tail business, primarily from: •Net favorable development of $337 million in workers’ compensation lines. This included favorable development of $62 million related to our annual assessment of multi-claimant events including industrial accidents, in the 2019 accident year. Consistent with prior years, we reviewed these potential exposures after the close of the accident year to allow for late reporting or identification of significant losses. This favorable development in accident year 2019 was partially offset by some higher than expected activity from other claims. The remaining overall favorable development was mainly in accident years 2016 and prior, driven by lower than expected loss experience and related updates to loss development factors; •Net favorable development of $66 million in professional liability (errors & omissions and cyber risk), driven by accident years 2016 and prior, which experienced lower than expected loss emergence; •Net favorable development of $43 million in voluntary environmental lines, in accident years 2016 and prior, due to lower than expected emergence and a related updates to loss development factors; •Net favorable development of $41 million on large multi-line prospective deals due to the same factors experienced for the three months ended September 30, 2020, as described above; •Net favorable development of $40 million in our foreign casualty businesses due to the same factors experienced for the three months ended September 30, 2020, as described above; •Net adverse development of $75 million in commercial automobile liability, mainly in high deductible and excess portfolios, driven by adverse paid and reported loss experience and related updates to loss development factors, mainly in accident years 2015 through 2019; and •Net adverse development of $5 million for U.S. child molestation claims, predominantly reviver statute-related. •Net favorable development of $12 million in short-tail business due to the same factors experienced for the three months ended September 30, 2020, as described above, which was offset by: •Net favorable development of $37 million, in accident and health, mainly in accident years 2018 and 2019, driven by lower than expected paid loss emergence; and •Net favorable development of $31 million in surety, driven by accident year 2018, where loss emergence was lower than expected. North America Personal P&C Insurance 2021 For the three months ended September 30, 2021, net favorable PPD was $182 million, driven by favorable development of $176 million in homeowners, including valuables, mainly in accident year 2020, which experienced better than expected non-catastrophe loss development. For the nine months ended September 30, 2021, net favorable PPD was $266 million, driven by favorable development of $216 million in homeowners, including valuables, due to the same factors experienced for the three months ended September 30, 2021 as described above and a favorable $43 million in automobile, predominantly from better than expected frequency results in accident year 2020 for physical damage coverages. 2020 For the three and nine months ended September 30, 2020, net adverse PPD was $48 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes: •Net adverse development of $69 million in our homeowners lines, including valuables, mainly in accident years 2017 through 2019 due to higher than expected non-catastrophe loss emergence and adverse development arising from natural catastrophes in accident years 2017 and 2018; and •Net favorable development of $22 million in our personal excess lines, driven by favorable development mainly in the 2017 accident year, partly offset by adverse development in accident year 2019. Overseas General Insurance 2021 For the three months ended September 30, 2021, net favorable PPD was $28 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes: •Net favorable development of $15 million in short-tail business, primarily from favorable claim development in surety in accident years 2018 through 2020. •Net favorable development of $13 million in long-tail business, primarily from: •Net favorable development of $72 million in casualty lines, including favorable development of $97 million in accident years 2017 and prior, due to lower than expected loss emergence across primary and excess lines in Continental Europe and U.K., partially offset by adverse development of $25 million in accident years 2018 through 2020, primarily due to higher than expected loss development and corresponding changes in loss development patterns on business in Asia Pacific; •Net favorable development of $24 million in other long tail lines including Environmental and Political Risks, primarily in accident years 2017 and prior; and •Net adverse development of $84 million in financial lines, with adverse development primarily in accident years 2011 through 2020 in Directors and Officers (D&O) on specific claims in Australia, and U.K., and adverse professional indemnity development, including medical malpractice, in various regions. For the nine months ended September 30, 2021, net favorable PPD was $209 million, primarily from: •Net favorable development of $201 million in short-tail business, primarily from: •Net favorable development of $55 million in accident and health lines, mainly due to favorable loss development across all regions in accident years 2019 and 2020; •Net favorable development of $54 million in property lines, in accident years 2019 and 2020, including a $21 million favorable reduction in COVID-19 estimates in accident year 2020. The remaining favorable development was across most regions in accident years 2019 and 2020; and •Net favorable development of $35 million in marine lines in accident years 2018 through 2020, driven by favorable loss development, specific claim reductions, and salvage and subrogation recoveries in Continental Europe and Asia Pacific. 2020 For the three months ended September 30, 2020, net favorable PPD was $60 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes: •Net favorable development of $71 million in long-tail business, primarily from: •Net favorable development of $94 million in casualty lines, including favorable development of $143 million in accident years 2016 and prior, due to lower than expected loss emergence across primary and excess lines in Continental Europe, U.K., and Asia Pacific, partially offset by adverse development of $49 million in accident years 2017 through 2019, primarily due to adverse large loss experience in the U.K. and Asia Pacific; •Net favorable development of $22 million in political risks, driven by benign loss experience in 2018 and 2019; and •Net adverse development of $57 million in financial lines, with adverse development of $125 million in accident years 2016 through 2019, primarily due to adverse large loss experience in D&O in the U.K. and Asia Pacific. This was partially offset by favorable development of $68 million in accident years 2015 and prior, primarily from favorable case-specific settlements within Continental Europe and Asia Pacific financial institutions. For the nine months ended September 30, 2020, net favorable PPD was $100 million, which was the net result of several underlying favorable and adverse movements and was driven by the following principal changes: •Net favorable development of $72 million in long-tail lines due to the same factors experienced for the three months ended September 30, 2020 described above; and •Net favorable development of $28 million in short-tail business, including $22 million in marine lines across all regions mainly in accident years 2017 and 2018. Global Reinsurance 2020 For the three and nine months ended September 30, 2020, net favorable PPD was $6 million and $29 million, respectively, which was the net result of several underlying favorable and adverse movements, none of which is significant individually or in the aggregate. Corporate 2021 For the three months ended September 30, 2021, net adverse development was $43 million, driven principally by development in environmental liabilities of $33 million due to certain case specific incurred activity. For the nine months ended September 30, 2021, net adverse development was $140 million, driven by adverse development of $68 million for molestation claims, as well as the adverse development noted above regarding environmental liabilities. The remainder of the adverse development was driven by increased claim costs on non-A&E run-off workers’ compensation exposures, and charges relating to unallocated loss adjustment expenses incurred. 2020 For the three months ended September 30, 2020, net adverse development was $54 million, driven principally by development in environmental liabilities of $35 million due to certain case specific incurred activity. For the nine months ended September 30, 2020 net adverse development was $339 million, driven by adverse development of $254 million for U.S. child molestation claims, predominantly reviver statute-related, as well as the adverse development noted above regarding environmental liabilities. The remainder of the adverse development was driven by increased claim costs on a limited number of non-A&E run-off casualty and workers’ compensation exposures, and charges relating to unallocated loss adjustment expenses due to run-off operating expenses.
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Commitments and Contingencies Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Commitments, contingencies, and guarantees | Commitments, contingencies, and guarantees a) Derivative instruments Foreign currency management As a global company, Chubb entities transact business in multiple currencies. Our policy is to generally match assets, liabilities, and required capital for each individual jurisdiction in local currency, which would include the use of derivatives discussed below. We do not hedge our net asset non-U.S. dollar capital positions; however, we do consider economic hedging for planned cross border transactions. Derivative instruments employed Chubb maintains positions in derivative instruments such as futures, options, swaps, and foreign currency forward contracts for which the primary purposes are to manage duration and foreign currency exposure, yield enhancement, or to obtain an exposure to a particular financial market. Chubb also maintains positions in convertible securities that contain embedded derivatives. Investment derivative instruments are recorded in either Other assets (OA) or Accounts payable, accrued expenses, and other liabilities (AP), convertible bonds are recorded in Fixed maturities available for sale (FM AFS), and convertible equity securities are recorded in Equity securities (ES) in the Consolidated balance sheets. These are the most numerous and frequent derivative transactions. In addition, Chubb purchases to be announced mortgage-backed securities (TBAs) as part of its investing activities. Under reinsurance programs covering GLBs, Chubb assumes the risk of GLBs, principally GMIB, associated with variable annuity contracts. The GMIB risk is triggered if, at the time the contract holder elects to convert the accumulated account value to a periodic payment stream (annuitize), the accumulated account value is not sufficient to provide a guaranteed minimum level of monthly income. The GLB reinsurance product meets the definition of a derivative instrument and is classified within AP. Chubb also generally maintains positions in exchange-traded equity futures contracts on equity market indices to limit equity exposure in the GMDB and GLB book of business. All derivative instruments are carried at fair value with changes in fair value recorded in Net realized gains (losses) in the Consolidated statements of operations. None of the derivative instruments are designated as hedges for accounting purposes. The following table presents the balance sheet locations, fair values of derivative instruments in an asset or (liability) position, and notional values/payment provisions of our derivative instruments:
(1)Includes fair value of embedded derivatives. (2)Related to GMDB and GLB book of business. (3)Note that the payment provision related to GLB is the net amount at risk. The concept of a notional value does not apply to the GLB reinsurance contracts. At September 30, 2021 and December 31, 2020, net derivative assets of $22 million and net derivative liabilities of $30 million, respectively, included in the table above were subject to a master netting agreement. The remaining derivatives included in the table above were not subject to a master netting agreement. The following table presents net realized gains (losses) related to derivative instrument activity in the Consolidated statements of operations:
(1)Includes embedded derivatives. (2)Related to GMDB and GLB book of business. b) Derivative instrument objectives (i) Foreign currency exposure management A foreign currency forward contract (forward) is an agreement between participants to exchange specific currencies at a future date. Chubb uses forwards to minimize the effect of fluctuating foreign currencies as discussed above. (ii) Duration management and market exposure Futures Futures contracts give the holder the right and obligation to participate in market movements, determined by the index or underlying security on which the futures contract is based. Settlement is made daily in cash by an amount equal to the change in value of the futures contract times a multiplier that scales the size of the contract. Exchange-traded futures contracts on money market instruments, notes, and bonds are used in fixed maturity portfolios to more efficiently manage duration, as substitutes for ownership of the money market instruments, bonds, and notes without significantly increasing the risk in the portfolio. Investments in futures contracts may be made only to the extent that there are assets under management not otherwise committed. Exchange-traded equity futures contracts are used to limit exposure to a severe equity market decline, which would cause an increase in expected claims and therefore, an increase in future policy benefit reserves for GMDB and an increase in the fair value liability for GLB reinsurance business. Options An option contract conveys to the holder the right, but not the obligation, to purchase or sell a specified amount or value of an underlying security at a fixed price. Option contracts are used in our investment portfolio as protection against unexpected shifts in interest rates, which would affect the duration of the fixed maturity portfolio. By using options in the portfolio, the overall interest rate sensitivity of the portfolio can be reduced. Option contracts may also be used as an alternative to futures contracts in the synthetic strategy as described above. The price of an option is influenced by the underlying security, expected volatility, time to expiration, and supply and demand. The credit risk associated with the above derivative financial instruments relates to the potential for non-performance by counterparties. Although non-performance is not anticipated, in order to minimize the risk of loss, management monitors the creditworthiness of its counterparties and obtains collateral. The performance of exchange-traded instruments is guaranteed by the exchange on which they trade. For non-exchange-traded instruments, the counterparties are principally banks which must meet certain criteria according to our investment guidelines. Interest rate swaps An interest rate swap is a contract between two counterparties in which interest payments are made based on a notional principal amount, which itself is never paid or received. Under the terms of an interest rate swap, one counterparty makes interest payments based on a fixed interest rate and the other counterparty’s payments are based on a floating rate. Interest rate swap contracts are used occasionally in our investment portfolio as protection against unexpected shifts in interest rates, which would affect the fair value of the fixed maturity portfolio. By using interest rate swaps in the portfolio, the overall duration or interest rate sensitivity of the portfolio can be impacted. Cross-currency swaps Cross-currency swaps are agreements under which two counterparties exchange interest payments and principal denominated in different currencies at a future date. We use cross-currency swaps to reduce the foreign currency and interest rate risk by converting cash flows back into local currency. We invest in foreign currency denominated investments to improve credit diversification and also to obtain better duration matching to our liabilities that is limited in the local currency market. Other Included within Other are derivatives intended to reduce potential losses which may arise from certain exposures in our insurance business. The economic benefit provided by these derivatives is similar to purchased reinsurance. For example, Chubb may enter into crop derivative contracts to protect underwriting results in the event of a significant decline in commodity prices. (iii) Convertible security investments A convertible security is a debt instrument or preferred stock that can be converted into a predetermined amount of the issuer’s equity. The convertible option is an embedded derivative within the host instruments which are classified in the investment portfolio as either available for sale or as an equity security. Chubb purchases convertible securities for their total return and not specifically for the conversion feature. (iv) TBA By acquiring TBAs, we make a commitment to purchase a future issuance of mortgage-backed securities. For the period between purchase of the TBAs and issuance of the underlying security, we account for our position as a derivative in the Consolidated Financial Statements. Chubb purchases TBAs both for their total return and for the flexibility they provide related to our mortgage-backed security strategy. (v) GLB Under the GLB program, as the assuming entity, Chubb is obligated to provide coverage until the expiration or maturity of the underlying deferred annuity contracts or the expiry of the reinsurance treaty. The GLB is accounted for as a derivative and is recorded at fair value. Fair value represents management’s estimate of an exit price and thus, includes a risk margin. We may recognize a realized loss for other changes in fair value due to adverse changes in the capital markets (e.g., declining interest rates and/or declining U.S. and/or international equity markets) and changes in actual or estimated future policyholder behavior (e.g., increased annuitization or decreased lapse rates) although we expect the business to be profitable. To mitigate adverse changes in the capital markets, we maintain positions in exchange-traded equity futures contracts, as noted under section "(ii) Futures" above. These futures increase in fair value when the S&P 500 index decreases (and decrease in fair value when the S&P 500 index increases). The net impact of gains or losses related to changes in fair value of the GLB liability and the exchange-traded equity futures are included in Net realized gains (losses). c) Securities lending and secured borrowings Chubb participates in a securities lending program operated by a third-party banking institution whereby certain assets are loaned to qualified borrowers and from which we earn an incremental return. The securities lending collateral can only be drawn down by Chubb in the event that the institution borrowing the securities is in default under the lending agreement. An indemnification agreement with the lending agent protects us in the event a borrower becomes insolvent or fails to return any of the securities on loan. The collateral is recorded in Securities lending collateral and the liability is recorded in Securities lending payable in the Consolidated balance sheets. The following table presents the carrying value of collateral held under securities lending agreements by investment category and remaining contractual maturity of the underlying agreements:
At September 30, 2021 and December 31, 2020, our repurchase agreement obligations of $1,406 million and $1,405 million, respectively, were fully collateralized. In contrast to securities lending programs, the use of cash received is not restricted for the repurchase obligations. The fair value of the underlying securities sold remains in Fixed maturities available for sale, and the repurchase agreement obligation is recorded in Repurchase agreements in the Consolidated balance sheets. The following table presents the carrying value of collateral pledged under repurchase agreements by investment category and remaining contractual maturity of the underlying agreements:
(1)Per the repurchase agreements, the amount of collateral posted is required to exceed the amount of gross liability. Potential risks exist in our secured borrowing transactions due to market conditions and counterparty exposure. With collateral that we pledge, there is a risk that the collateral may not be returned at the expiration of the agreement. If the counterparty fails to return the collateral, Chubb will have free use of the borrowed funds until our collateral is returned. In addition, we may encounter the risk that Chubb may not be able to renew outstanding borrowings with a new term or with an existing counterparty due to market conditions including a decrease in demand as well as more restrictive terms from banks due to increased regulatory and capital constraints. Should this condition occur, Chubb may seek alternative borrowing sources or reduce borrowings. Additionally, increased margins and collateral requirements due to market conditions would increase our restricted assets as we are required to provide additional collateral to support the transaction. d) Fixed maturities At September 30, 2021, we have commitments to purchase fixed income securities of $825 million over the next several years. e) Other investments At September 30, 2021, included in Other investments in the Consolidated balance sheet are investments in limited partnerships and partially-owned investment companies with a carrying value of $9.5 billion. In connection with these investments, we have commitments that may require funding of up to $7.1 billion over the next several years. At December 31, 2020, these investments had a carrying value of $6.5 billion with a commitment that may require funding of up to $3.2 billion. f) Income taxes At September 30, 2021, $62 million of unrecognized tax benefits remain outstanding. It is reasonably possible that over the next twelve months, that the amount of unrecognized tax benefits may change resulting from the re-evaluation of unrecognized tax benefits arising from examinations by taxing authorities, settlements and the lapses of statutes of limitations. With few exceptions, Chubb is no longer subject to income tax examinations for years before 2012. g) Legal proceedings Our insurance subsidiaries are subject to claims litigation involving disputed interpretations of policy coverages and, in some jurisdictions, direct actions by allegedly-injured persons seeking damages from policyholders. These lawsuits, involving claims on policies issued by our subsidiaries which are typical to the insurance industry in general and in the normal course of business, are considered in our loss and loss expense reserves. In addition to claims litigation, we are subject to lawsuits and regulatory actions in the normal course of business that do not arise from or directly relate to claims on insurance policies. This category of business litigation typically involves, among other things, allegations of underwriting errors or misconduct, employment claims, regulatory activity, or disputes arising from our business ventures. In the opinion of management, our ultimate liability for these matters could be, but we believe is not likely to be, material to our consolidated financial condition and results of operations. h) Leases At September 30, 2021 and December 31, 2020, the right-of-use asset was $434 million and $473 million, respectively, recorded within Other assets on the Consolidated balance sheets and the lease liability was $472 million and $517 million, respectively, which was recorded within Accounts payable, accrued expenses, and other liabilities on the Consolidated balance sheets. These leases consist principally of real estate operating leases that are amortized on a straight-line basis over the term of the lease, which expire at various dates.
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Stockholders' Equity Note [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Shareholders' equity | Shareholders’ equity All of Chubb’s Common Shares are authorized under Swiss corporate law. Though the par value of Common Shares is stated in Swiss francs, Chubb continues to use U.S. dollars as its reporting currency for preparing the Consolidated Financial statements. Under Swiss corporate law, dividends, including distributions from legal reserves or through a reduction in par value (par value reduction), must be stated in Swiss francs though dividend payments are made by Chubb in U.S. dollars. At September 30, 2021, our Common Shares had a par value of CHF 24.15 per share. At our May 2021 annual general meeting, our shareholders approved an annual dividend for the following year of up to $3.20 per share, expected to be paid in four quarterly installments of $0.80 per share after the general meeting by way of distribution from capital contribution reserves, transferred to free reserves for payment. The Board of Directors (Board) will determine the record and payment dates at which the annual dividend may be paid until the date of the 2022 annual general meeting, and is authorized to abstain from distributing a dividend at its discretion. At our May 2020 and 2019 annual general meetings, our shareholders approved annual dividends for the following year of up to $3.12 per share and $3.00 per share, respectively, which were paid in four quarterly installments of $0.78 per share and $0.75 per share, respectively, at dates determined by the Board after the annual general meetings by way of a distribution from capital contribution reserves, transferred to free reserves for payment. The following table presents dividend distributions per Common Share in Swiss francs (CHF) and U.S. dollars (USD):
Increases in Common Shares in treasury are due to open market repurchases of Common Shares and the surrender of Common Shares to satisfy tax withholding obligations in connection with the vesting of restricted stock and the forfeiture of unvested restricted stock. Decreases in Common Shares in treasury are principally due to grants of restricted stock, exercises of stock options, purchases under the Employee Stock Purchase Plan (ESPP), and share cancellations. At our May 2021 annual general meeting, our shareholders approved the cancellation of 3,584,150 shares purchased under our share repurchase program during 2020. The capital reduction by cancellation of shares was subject to publication requirements and a two-month waiting period in accordance with Swiss law and became effective August 4, 2021. During the nine months ended September 30, 2021, 22,877,400 shares were repurchased, 3,584,150 shares were canceled, and 3,021,027 net shares were issued under employee share-based compensation plans. At September 30, 2021, 43,144,862 Common Shares remain in treasury. Chubb Limited securities repurchase authorizations The Board has authorized share repurchase programs as follows: •$1.5 billion of Chubb Common Shares from November 21, 2019 through December 31, 2020 •$1.5 billion of Chubb Common Shares from November 19, 2020 through December 31, 2021 In February 2021, the Board approved an increase to the November 2020 share repurchase program of $1.0 billion to a total of $2.5 billion, effective through December 31, 2021. On July 19, 2021, the Board authorized a one-time incremental share repurchase program of up to $5.0 billion through June 30, 2022. The $2.5 billion share repurchase authorization was used prior to the $5.0 billion share repurchase authorization. The following table presents repurchases of Chubb's Common Shares conducted in a series of open market transactions under the Board authorizations:
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Share-based compensation |
9 Months Ended |
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Sep. 30, 2021 | |
Share-based Payment Arrangement [Abstract] | |
Share-based compensation | Share-based compensation The Chubb Limited 2016 Long-Term Incentive Plan (the 2016 LTIP) permits grants of both incentive and non-qualified stock options principally at an option price per share equal to the grant date fair value of Chubb's Common Shares. Stock options are generally granted with a 3-year vesting period and a 10-year term. Stock options typically vest in equal annual installments over the respective vesting period, which is also the requisite service period. On February 25, 2021, Chubb granted 1,790,057 stock options with a weighted-average grant date fair value of $33.05 each. The fair value of the options issued is estimated on the grant date using the Black-Scholes option pricing model. The 2016 LTIP also permits grants of service-based restricted stock and restricted stock units as well as performance-based restricted stock awards. Chubb generally grants service-based restricted stock and restricted stock units with a 4-year vesting period, based on a graded vesting schedule. Beginning in 2017, the performance-based restricted stock awards granted comprise target awards and premium awards that cliff vest at the end of a 3-year performance period based on both tangible book value (shareholders' equity less goodwill and intangible assets, net of tax) per share growth and P&C combined ratio compared to a defined group of peer companies. Premium awards are subject to an additional vesting provision based on total shareholder return compared to our peer group. The restricted stock is granted at market close price on the grant date. On February 25, 2021, Chubb granted 848,762 service-based restricted stock awards, 324,142 service-based restricted stock units, and 284,766 performance-based stock awards to employees and officers with a grant date fair value of $164.94 each. Each restricted stock unit represents our obligation to deliver to the holder one Common Share upon vesting. In May 2021, our shareholders approved the Chubb Limited 2016 Long-Term Incentive Plan, as amended and restated (the Amended 2016 LTIP). Under the Amended 2016 LTIP, the number of Common Shares available for delivery increased by 13.4 million. This is in addition to any shares that remain available for delivery since the initial establishment of the 2016 LTIP, plus any shares covered by outstanding awards granted under the ACE Limited 2004 Long-Term Incentive Plan that are forfeited, expired or canceled after the effective date of the Amended 2016 LTIP.
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Postretirement benefits |
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Retirement Benefits [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Compensation and Employee Benefit Plans [Text Block] | Postretirement benefits The components of net pension and other postretirement benefit costs (benefits) reflected in Net income in the Consolidated statements of operations were as follows:
(1) At June 30, 2021, the remaining prior service cost amortization related to the 2016 harmonization of our U.S. retirement program was fully amortized. Refer to Note 13 to the Consolidated Financial Statements of our 2020 Form 10-K for additional information.
The line items in which the service cost and non-service cost (benefit) components of net periodic benefit cost (benefit) are included in the Consolidated statements of operations were as follows:
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Other Income and Expenses |
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Other Income and Expenses [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Other Income and Other Expense Disclosure | Other income and expense
(1) Principally comprises our share of operating income and mark-to-market movement on private equities where we hold more than three percent. Also includes net income from our investment in Huatai of $40 million and $144 million for the three and nine months ended September 30, 2021, respectively, compared to $37 million and $86 million, respectively, for the prior year periods. (2) Related to gains (losses) from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP. Other income and expense includes equity in net income of partially-owned entities, which includes our share of net income or loss, both underlying operating income and mark-to-market movement, related to partially-owned investment companies (private equity) and partially-owned insurance companies. Also included in Other income and expense are gains (losses) from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP. The offsetting movement in the separate account liabilities is included in Policy benefits in the Consolidated statements of operations. Certain federal excise and capital taxes incurred as a result of capital management initiatives are included in Other income and expense as these are considered capital transactions and are excluded from underwriting results. Bad debt expense for uncollectible premiums is also included in Other income and expense.
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Segment Reporting [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Segment information | Segment information Chubb operates through six business segments: North America Commercial P&C Insurance, North America Personal P&C Insurance, North America Agricultural Insurance, Overseas General Insurance, Global Reinsurance, and Life Insurance. Corporate results primarily include income and expenses not attributable to reportable segments and losses and loss expenses of asbestos and environmental (A&E) liabilities and certain other non-A&E run-off exposures. Management uses underwriting income (loss) as the basis for segment performance. Chubb calculates underwriting income (loss) by subtracting Losses and loss expenses, Policy benefits, Policy acquisition costs, and Administrative expenses from Net premiums earned. Our main measure of segment performance is Segment income (loss), which also includes Net investment income (loss), Other (income) expense, and Amortization of purchased intangibles acquired by the segment. We determined that this definition of segment income (loss) is appropriate and aligns with how the business is managed. We continue to evaluate our segments as our business continues to evolve and may further refine our segments and segment income (loss) measures. Certain items are presented in a different manner for segment reporting purposes than in the Consolidated Financial Statements. These items are reconciled to the consolidated presentation in the Segment measure reclass column below and include: •Losses and loss expenses include realized gains and losses on crop derivatives. These derivatives were purchased to provide economic benefit, in a manner similar to reinsurance protection, in the event that a significant decline in commodity pricing impacts underwriting results. We view gains and losses on these derivatives as part of the results of our underwriting operations, and therefore realized gains (losses) from these derivatives are reclassified to losses and loss expenses. •Policy benefits include gains and losses from fair value changes in separate account assets, as well as the offsetting movement in separate account liabilities. The gains and losses from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP have been reclassified from Other (income) expense. We view gains and losses from fair value changes in both separate account assets and liabilities as part of the results of our underwriting operations, and therefore these gains and losses are reclassified to policy benefits. •Net investment income includes investment income reclassified from Other (income) expense related to partially-owned investment companies (private equity partnerships) where our ownership interest is in excess of three percent. We view investment income from these equity-method private equity partnerships as net investment income. The following tables present the Statement of Operations by segment:
(1)Principally includes our share of operating income and market-to-market gains on private equities where we hold more than three percent. Refer to Note 11 for additional information.
Underwriting assets are reviewed in total by management for purposes of decision-making. Other than Unpaid losses and loss expenses, Future policy benefits, Reinsurance recoverables, Goodwill and Other intangible assets, Chubb does not allocate assets to its segments.
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Earnings per share |
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Earnings Per Share [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Earnings per share | Earnings per share
Excluded from weighted-average shares outstanding and assumed conversions is the impact of securities that would have been anti-dilutive during the respective periods.
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General (Policies) |
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Organization, Consolidation and Presentation of Financial Statements [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Basis of presentation | Basis of presentation Chubb Limited is a holding company incorporated in Zurich, Switzerland. Chubb Limited, through its subsidiaries, provides a broad range of insurance and reinsurance products to insureds worldwide. Our results are reported through the following business segments: North America Commercial P&C Insurance, North America Personal P&C Insurance, North America Agricultural Insurance, Overseas General Insurance, Global Reinsurance, and Life Insurance. Refer to Note 12 for additional information. The interim unaudited consolidated financial statements, which include the accounts of Chubb Limited and its subsidiaries (collectively, Chubb, we, us, or our), have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) and, in the opinion of management, reflect all adjustments necessary for a fair statement of the results and financial position for such periods. All significant intercompany accounts and transactions, including internal reinsurance transactions, have been eliminated. The results of operations and cash flows for any interim period are not necessarily indicative of the results for the full year. These consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in our 2020 Form 10-K.
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Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] | Restricted cash Restricted cash in the Consolidated balance sheets represents amounts held for the benefit of third parties and is legally or contractually restricted as to withdrawal or usage. Amounts include deposits with U.S. and non-U.S. regulatory authorities, trust funds set up for the benefit of ceding companies, and amounts pledged as collateral to meet financing arrangements. The following table provides a reconciliation of cash and restricted cash reported within the Consolidated balance sheets that total to the amounts shown in the Consolidated statements of cash flows:
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Accounting guidance not yet adopted | Accounting guidance not yet adopted Targeted Improvements to the Accounting for Long-Duration Contracts In August 2018, the FASB issued guidance to improve the existing recognition, measurement, presentation, and disclosure requirements for long-duration contracts issued by an insurance entity. The amendments in this update require more frequent updating of assumptions and a standardized discount rate for the future policy benefit liability, a requirement to use the fair value measurement model for policies with market risk benefits, simplified amortization of deferred acquisition costs, and enhanced disclosures. This standard will be effective in the first quarter of 2023 with early adoption permitted. We are currently assessing the effect of adopting this guidance on our financial condition and results of operations. We will be better able to quantify the effect of adopting this standard as we progress in our implementation process and draw nearer to the date of adoption.
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Fair value measurements Fair Value Measurement Policy (Policies) |
9 Months Ended |
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Sep. 30, 2021 | |
Fair Value Disclosures [Abstract] | |
Fair Value Measurement, Policy [Policy Text Block] | Fair value of financial assets and financial liabilities is estimated based on the framework established in the fair value accounting guidance. The guidance defines fair value as the price to sell an asset or transfer a liability (an exit price) in an orderly transaction between market participants and establishes a three-level valuation hierarchy based on the reliability of the inputs. The fair value hierarchy gives the highest priority to quoted prices in active markets and the lowest priority to unobservable data. The three levels of the hierarchy are as follows: •Level 1 – Unadjusted quoted prices for identical assets or liabilities in active markets; •Level 2 – Includes, among other items, inputs other than quoted prices that are observable for the asset or liability such as interest rates and yield curves, quoted prices for similar assets and liabilities in active markets, and quoted prices for identical or similar assets and liabilities in markets that are not active; and •Level 3 – Inputs that are unobservable and reflect management’s judgments about assumptions that market participants would use in pricing an asset or liability.
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General General (Tables) |
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Cash and Cash Equivalents [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule of Cash and Cash Equivalents [Table Text Block] | The following table provides a reconciliation of cash and restricted cash reported within the Consolidated balance sheets that total to the amounts shown in the Consolidated statements of cash flows:
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Investments (Tables) |
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Investments, Debt and Equity Securities [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule Of Amortized Cost And Fair Value Of HTM Fixed Maturities |
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Schedule Of Amortized Cost and Fair Value of Available-for-sale Securities |
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Debt Securities, Held-to-maturity, Credit Quality Indicator [Table Text Block] | The following table presents the amortized cost of our Held to Maturity (HTM) securities according to S&P rating:
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Schedule Of Fixed Maturities By Contractual Maturity | The following table presents fixed maturities by contractual maturity:
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Schedule Of Aggregate Fair Value And Gross Unrealized Loss By Length Of Time The Security Has Continuously Been In An Unrealized Loss Position | The following tables present, for Available for Sale (AFS) fixed maturities in an unrealized loss position (including securities on loan) that are not deemed to have expected credit losses, the aggregate fair value and gross unrealized loss by length of time the security has continuously been in an unrealized loss position:
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Schedule of Realized Gain (Loss) | The following table presents the components of Net realized gains (losses):
(1)Relates to certain securities we intended to sell and securities written to market entering default.
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Gain (Loss) on Securities [Table Text Block] | Realized gains and losses from Equity securities and Other investments from the table above include sales of securities and unrealized gains and losses from fair value changes as follows:
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Debt Securities, Available-for-sale, Allowance for Credit Loss [Table Text Block] | The following table presents a roll-forward of valuation allowance for expected credit losses on fixed maturities:
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Debt Securities, Held-to-maturity, Allowance for Credit Loss [Table Text Block] | The following table presents a roll-forward of valuation allowance for expected credit losses on fixed maturities:
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Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table Text Block] |
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Schedule Of Components Of Restricted Assets | The following table presents the components of restricted assets:
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Fair value measurements (Tables) |
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Fair Value Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Financial Instruments Measured At Fair Value On A Recurring Basis | Financial instruments measured at fair value on a recurring basis, by valuation hierarchy
(1)Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of $9,768 million, policy loans of $235 million and other investments of $80 million at September 30, 2021 measured using NAV as a practical expedient. (2)Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value.
(1)Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of $6,770 million, policy loans of $233 million and other investments of $60 million at December 31, 2020 measured using NAV as a practical expedient. (2)Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value.
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Schedule Of Significant Unobservable Inputs Used In Level 3 Liability Valuations | The following table presents the significant unobservable inputs used in the Level 3 liability valuations. Excluded from the table below are inputs used to determine the fair value of Level 3 assets which are based on single broker quotes and contain no quantitative unobservable inputs developed by management. The majority of our fixed maturities classified as Level 3 used external pricing when markets are less liquid due to the lack of market inputs (i.e., stale pricing, broker quotes).
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Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] | The following tables present a reconciliation of the beginning and ending balances of financial instruments measured at fair value using significant unobservable inputs (Level 3):
(1)Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value.
(1)Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value.
(1)Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value.
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Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] | The following tables present a reconciliation of the beginning and ending balances of financial instruments measured at fair value using significant unobservable inputs (Level 3):
(1)Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value.
(1)Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value.
(1)Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value.
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Carrying Values And Fair Values Of Financial Instruments Not Measured At Fair Value | The following tables present fair value, by valuation hierarchy, and carrying value of the financial instruments not measured at fair value:
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Reinsurance (Tables) |
9 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2021 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reinsurance Disclosures [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
schedule of reinsurance recoverable on ceded insurance |
(1)Net of valuation allowance for uncollectible reinsurance.
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Reinsurance Recoverable, Allowance for Credit Loss [Table Text Block] | The following table presents a roll-forward of valuation allowance for uncollectible reinsurance related to Reinsurance recoverable on loss and loss expenses:
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Unpaid losses and loss expenses Unpaid losses and loss expenses (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Liability for Claims and Claims Adjustment Expense [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] | The following table presents a reconciliation of beginning and ending Unpaid losses and loss expenses:
(1) Net of valuation allowance for uncollectible reinsurance. (2) Relates to prior period loss reserve development only and excludes prior period development related to reinstatement premiums, expense adjustments and earned premiums totaling $87 million and $23 million for the nine months ended September 30, 2021 and 2020, respectively.
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Prior Period Development, by Segment [Table Text Block] | The following table summarizes (favorable) and adverse PPD by segment.
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Commitments, contingencies, and guarantees (Tables) |
9 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Commitments and Contingencies Disclosure [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Balance Sheet Locations, Fair Values In An Asset Or (Liability) Position, And Notional Values/Payment Provisions Of Derivative Instruments | The following table presents the balance sheet locations, fair values of derivative instruments in an asset or (liability) position, and notional values/payment provisions of our derivative instruments:
(1)Includes fair value of embedded derivatives. (2)Related to GMDB and GLB book of business. (3)Note that the payment provision related to GLB is the net amount at risk. The concept of a notional value does not apply to the GLB reinsurance contracts.
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Net Realized Gains (Losses) Of Derivative Instrument Activity In Consolidated Statement Of Operations | The following table presents net realized gains (losses) related to derivative instrument activity in the Consolidated statements of operations:
(1)Includes embedded derivatives. (2)Related to GMDB and GLB book of business.
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Transfer of Certain Financial Assets Accounted for as Secured Borrowings | The following table presents the carrying value of collateral held under securities lending agreements by investment category and remaining contractual maturity of the underlying agreements:
The following table presents the carrying value of collateral pledged under repurchase agreements by investment category and remaining contractual maturity of the underlying agreements:
(1)Per the repurchase agreements, the amount of collateral posted is required to exceed the amount of gross liability.
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Shareholders' Equity (Tables) |
9 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2021 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Stockholders' Equity Note [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Dividends Declared | The following table presents dividend distributions per Common Share in Swiss francs (CHF) and U.S. dollars (USD):
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Share Repurchase Program [Table Text Block] | The following table presents repurchases of Chubb's Common Shares conducted in a series of open market transactions under the Board authorizations:
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Postretirement benefits (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2021 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Retirement Benefits [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule of Net Benefit Costs [Table Text Block] | The components of net pension and other postretirement benefit costs (benefits) reflected in Net income in the Consolidated statements of operations were as follows:
(1) At June 30, 2021, the remaining prior service cost amortization related to the 2016 harmonization of our U.S. retirement program was fully amortized. Refer to Note 13 to the Consolidated Financial Statements of our 2020 Form 10-K for additional information.
The line items in which the service cost and non-service cost (benefit) components of net periodic benefit cost (benefit) are included in the Consolidated statements of operations were as follows:
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Other Income and Expenses (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2021 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Other Income and Expenses [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule of Other Nonoperating Income (Expense) |
(1) Principally comprises our share of operating income and mark-to-market movement on private equities where we hold more than three percent. Also includes net income from our investment in Huatai of $40 million and $144 million for the three and nine months ended September 30, 2021, respectively, compared to $37 million and $86 million, respectively, for the prior year periods. (2) Related to gains (losses) from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP.
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Segment information (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2021 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Segment Reporting [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Operations By Segment | The following tables present the Statement of Operations by segment:
(1)Principally includes our share of operating income and market-to-market gains on private equities where we hold more than three percent. Refer to Note 11 for additional information.
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Earnings per share (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2021 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Earnings Per Share [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule Of Earnings Per Share, Basic And Diluted |
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General Schedule of Cash and Cash Equivalent (Details) - USD ($) $ in Millions |
Sep. 30, 2021 |
Dec. 31, 2020 |
Sep. 30, 2020 |
Dec. 31, 2019 |
---|---|---|---|---|
Cash and Cash Equivalents [Line Items] | ||||
Cash | $ 1,620 | $ 1,747 | ||
Restricted cash | 176 | 89 | ||
Total cash and restricted cash shown in the Consolidated statement of cash flows | $ 1,796 | $ 1,836 | $ 1,873 | $ 1,646 |
General Goodwill (Details) $ in Millions |
9 Months Ended |
---|---|
Sep. 30, 2021
USD ($)
| |
Goodwill and Intangible Assets Disclosure [Abstract] | |
Goodwill, Period Increase (Decrease) | $ (13) |
General Adoption of New Accounting Pronouncements (Details) - USD ($) $ in Millions |
Sep. 30, 2021 |
Jun. 30, 2021 |
Dec. 31, 2020 |
Sep. 30, 2020 |
Jun. 30, 2020 |
Dec. 31, 2019 |
---|---|---|---|---|---|---|
New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||||
Cumulative Effect on Retained Earnings, Net of Tax | $ (59,318) | $ (59,441) | $ (56,413) | |||
Retained Earnings [Member] | ||||||
New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||||
Cumulative Effect on Retained Earnings, Net of Tax | $ (45,224) | $ (43,902) | (39,337) | $ (36,919) | $ (35,991) | $ (36,142) |
Retained Earnings [Member] | Cumulative Effect, Period of Adoption, Adjustment | ||||||
New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||||
Cumulative Effect on Retained Earnings, Net of Tax | $ 0 | $ 0 | $ 0 | $ 72 |
Acquisitions Investments (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | 12 Months Ended | |
---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2021 |
Dec. 31, 2019 |
Oct. 07, 2021 |
|
Cigna's Life Insurance Business in Asia-Pacific Markets [Member] | Subsequent Event [Member] | ||||
Investment Holdings [Line Items] | ||||
BusinessAcquisitionCostOfAcquiredEntityExpectedCashConsideration [Member] | $ 5,750 | |||
Huatai Group [Member] | CHINA | ||||
Investment Holdings [Line Items] | ||||
Equity Method Investment, Ownership Percentage | 47.10% | 47.10% | ||
Equity method investment, additional 7.1 percentage agreed on | 7.10% | |||
Equity method investment, additional 6.4 percentage agreed on [Table] | 6.40% | |||
Equity method investment, incremental 0.9 percent obtained | 0.90% | |||
Purchase of incremental ownership interest | $ 65 | |||
Deposits Assets | $ 143 | $ 143 |
Investments (Narrative) (Detail) - USD ($) $ in Millions |
Sep. 30, 2021 |
Dec. 31, 2020 |
---|---|---|
Investments [Line Items] | ||
Restricted assets in fixed maturities and short-term investments | $ 18,820 | $ 19,610 |
Restricted assets in cash | $ 176 | $ 89 |
Investments Schedule of Gains and Losses on Equity and Other Investments (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
|
Gain (Loss) on Securities [Line Items] | ||||
Realized Investment Gains (Losses) | $ (21) | $ (141) | $ 833 | $ (1,069) |
Equity Securities [Member] | ||||
Gain (Loss) on Securities [Line Items] | ||||
Equity Securities, FV-NI, Realized Gain (Loss) | (42) | 0 | 475 | 119 |
Less: Net gains (losses) recognized from sales of securities | 19 | 34 | 109 | 197 |
Unrealized gains (losses) recognized for securities still held at reporting date | (61) | (34) | 366 | (78) |
Other Investments [Member] | ||||
Gain (Loss) on Securities [Line Items] | ||||
Realized Investment Gains (Losses) | 11 | 31 | 111 | (71) |
Less: Net gains (losses) recognized from sales of securities | 0 | 0 | 0 | 0 |
Unrealized gains (losses) recognized for securities still held at reporting date | 11 | 31 | 111 | (71) |
Equity securities and other investments [Member] | ||||
Gain (Loss) on Securities [Line Items] | ||||
Realized Investment Gains (Losses) | (31) | 31 | 586 | 48 |
Less: Net gains (losses) recognized from sales of securities | 19 | 34 | 109 | 197 |
Unrealized gains (losses) recognized for securities still held at reporting date | $ (50) | $ (3) | $ 477 | $ (149) |
Investments (Rollforward of expected credit-losses, AFS) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
Jun. 30, 2021 |
Jan. 01, 2021 |
Dec. 31, 2020 |
Jun. 30, 2020 |
Jan. 01, 2020 |
Dec. 31, 2019 |
|
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] | ||||||||||
Debt Securities, Available-for-sale, Allowance for Credit Loss | $ 12 | $ 34 | $ 12 | $ 34 | $ 11 | $ 20 | $ 69 | $ 0 | ||
Debt Securities, Available-for-sale, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase | 0 | 0 | 0 | 5 | ||||||
Debt Securities, Available-for-sale, Allowance for Credit Loss, Recovery | (2) | (40) | (16) | (174) | ||||||
Debt Securities, Available-for-sale, Allowance for Credit Loss, Writeoff | 0 | 0 | 0 | (5) | ||||||
Accounting Standards Update 2016-13 [Member] | ||||||||||
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] | ||||||||||
Debt Securities, Available-for-sale, Allowance for Credit Loss | $ 0 | $ 25 | ||||||||
Debt Securities, Available-for-sale, Allowance for Credit Loss, Period Increase (Decrease) | $ 3 | $ 5 | $ 8 | $ 183 |
Investments (Rollforward of expected credit losses HTM) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
Jun. 30, 2021 |
Jan. 01, 2021 |
Dec. 31, 2020 |
Jun. 30, 2020 |
Jan. 01, 2020 |
Dec. 31, 2019 |
|
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items] | ||||||||||
Debt Securities, Held-to-maturity, Allowance for Credit Loss | $ 35 | $ 45 | $ 35 | $ 45 | $ 37 | $ 44 | $ 51 | $ 0 | ||
Debt Securities, Held-to-maturity, Allowance for Credit Loss, Recovery | (2) | (8) | (9) | (8) | ||||||
Accounting Standards Update 2016-13 [Member] | ||||||||||
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items] | ||||||||||
Debt Securities, Held-to-maturity, Allowance for Credit Loss | $ 0 | $ 44 | ||||||||
Debt Securities, Held-to-maturity, Allowance for Credit Loss, Period Increase (Decrease) | $ 0 | $ 2 | $ 0 | $ 9 |
Investments Entities that Calculate Net Asset Value Per Share (Details) - USD ($) $ in Millions |
9 Months Ended | 12 Months Ended |
---|---|---|
Sep. 30, 2021 |
Dec. 31, 2020 |
|
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments | $ 7,131 | $ 3,200 |
Alternative Investment | 9,768 | 6,770 |
Financial [Member] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments | 309 | 237 |
Alternative Investment | 1,064 | 673 |
Real Estate Funds [Member] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments | 772 | 598 |
Alternative Investment | 1,092 | 805 |
Distressed Alternative Investments [Member] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments | 813 | 970 |
Alternative Investment | 568 | 358 |
Private Credit Alternative Investments [Member] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments | 279 | 270 |
Alternative Investment | 82 | 88 |
Private Equity Funds [Member] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments | 4,958 | 1,125 |
Alternative Investment | 6,616 | 4,519 |
Vintage Alternative Investments [Member] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments | 0 | 0 |
Alternative Investment | 64 | 73 |
Investment Funds Alternative Investments [Member] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments | 0 | 0 |
Alternative Investment | $ 282 | $ 254 |
Minimum [Member] | Financial [Member] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period | 2 years | 2 years |
Minimum [Member] | Real Estate Funds [Member] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period | 2 years | 2 years |
Minimum [Member] | Distressed Alternative Investments [Member] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period | 2 years | 2 years |
Minimum [Member] | Private Credit Alternative Investments [Member] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period | 3 years | 3 years |
Minimum [Member] | Private Equity Funds [Member] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period | 2 years | 2 years |
Minimum [Member] | Vintage Alternative Investments [Member] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period | 1 year | 1 year |
Maximum [Member] | Financial [Member] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period | 10 years | 10 years |
Maximum [Member] | Real Estate Funds [Member] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period | 11 years | 11 years |
Maximum [Member] | Distressed Alternative Investments [Member] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period | 8 years | 8 years |
Maximum [Member] | Private Credit Alternative Investments [Member] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period | 8 years | 8 years |
Maximum [Member] | Private Equity Funds [Member] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period | 14 years | 14 years |
Maximum [Member] | Vintage Alternative Investments [Member] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ||
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period | 2 years | 2 years |
Investments (Schedule Of Components Of Restricted Assets) (Detail) - USD ($) $ in Millions |
Sep. 30, 2021 |
Dec. 31, 2020 |
---|---|---|
Investments, Debt and Equity Securities [Abstract] | ||
Trust funds | $ 11,669 | $ 12,305 |
Deposits with U.S. regulatory authorities | 2,418 | 2,438 |
Deposits With Non United States Regulatory Authorities | 2,858 | 2,905 |
Assets pledged under repurchase agreements | 1,425 | 1,462 |
Other pledged assets | 632 | 584 |
Total restricted assets | $ 19,002 | $ 19,694 |
Fair Value Measurements (Financial Instruments Measured At Fair Value On Recurring Basis) (Detail) - USD ($) $ in Millions |
Sep. 30, 2021 |
Dec. 31, 2020 |
||||||||
---|---|---|---|---|---|---|---|---|---|---|
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | $ 92,685 | $ 90,699 | ||||||||
Equity securities, at fair value | 4,557 | 4,027 | ||||||||
Short-term investments | 3,529 | 4,345 | ||||||||
Other investments, at fair value | 10,843 | 7,945 | ||||||||
Securities lending collateral | 2,368 | 1,844 | ||||||||
U.S. Treasury / Agency | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 2,287 | 2,670 | ||||||||
Non-U.S. | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 25,927 | 26,354 | ||||||||
Corporate and asset-backed securities | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 38,716 | 36,331 | ||||||||
Mortgage-backed securities | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 19,963 | 18,470 | ||||||||
Municipal | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 5,792 | 6,874 | ||||||||
Fair Value, Recurring [Member] | Level 1 | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 1,786 | 2,148 | ||||||||
Equity securities, at fair value | 4,478 | 3,954 | ||||||||
Short-term investments | 2,012 | 2,866 | ||||||||
Other investments, at fair value | 292 | 434 | [1] | |||||||
Securities lending collateral | 0 | 0 | ||||||||
Investment derivative instruments, assets | 97 | 35 | ||||||||
Other Derivative Instruments Fair Value | 35 | |||||||||
Separate Account Asset | 5,225 | 4,264 | ||||||||
Total assets measured at fair value | 13,925 | [2] | 13,701 | [1] | ||||||
Investment derivative instruments, liabilities | 111 | 52 | ||||||||
Other derivative instruments, liability | 17 | |||||||||
Liabilities Related to Investment Contracts, Fair Value Disclosure | 111 | 69 | ||||||||
Fair Value, Recurring [Member] | Level 1 | U.S. Treasury / Agency | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 1,786 | 2,148 | ||||||||
Fair Value, Recurring [Member] | Level 1 | Non-U.S. | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 0 | 0 | ||||||||
Fair Value, Recurring [Member] | Level 1 | Corporate and asset-backed securities | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 0 | 0 | ||||||||
Fair Value, Recurring [Member] | Level 1 | Mortgage-backed securities | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 0 | 0 | ||||||||
Fair Value, Recurring [Member] | Level 1 | Municipal | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 0 | 0 | ||||||||
Fair Value, Recurring [Member] | Level 1 | GLB | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross | 0 | 0 | [3] | |||||||
Fair Value, Recurring [Member] | Level 2 | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 88,327 | 86,372 | ||||||||
Equity securities, at fair value | 0 | 0 | ||||||||
Short-term investments | 1,507 | 1,474 | ||||||||
Other investments, at fair value | 468 | 438 | [1] | |||||||
Securities lending collateral | 2,368 | 1,844 | ||||||||
Investment derivative instruments, assets | 0 | 0 | ||||||||
Other Derivative Instruments Fair Value | 0 | |||||||||
Separate Account Asset | 105 | 124 | ||||||||
Total assets measured at fair value | 92,775 | [2] | 90,252 | [1] | ||||||
Investment derivative instruments, liabilities | 0 | 0 | ||||||||
Other derivative instruments, liability | 0 | |||||||||
Liabilities Related to Investment Contracts, Fair Value Disclosure | 0 | 0 | ||||||||
Fair Value, Recurring [Member] | Level 2 | U.S. Treasury / Agency | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 501 | 522 | ||||||||
Fair Value, Recurring [Member] | Level 2 | Non-U.S. | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 25,267 | 25,808 | ||||||||
Fair Value, Recurring [Member] | Level 2 | Corporate and asset-backed securities | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 36,857 | 34,758 | ||||||||
Fair Value, Recurring [Member] | Level 2 | Mortgage-backed securities | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 19,910 | 18,410 | ||||||||
Fair Value, Recurring [Member] | Level 2 | Municipal | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 5,792 | 6,874 | ||||||||
Fair Value, Recurring [Member] | Level 2 | GLB | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross | 0 | 0 | [3] | |||||||
Fair Value, Recurring [Member] | Level 3 | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 2,572 | 2,179 | ||||||||
Equity securities, at fair value | 79 | 73 | ||||||||
Short-term investments | 10 | 5 | ||||||||
Other investments, at fair value | 0 | 10 | [1] | |||||||
Securities lending collateral | 0 | 0 | ||||||||
Investment derivative instruments, assets | 0 | 0 | ||||||||
Other Derivative Instruments Fair Value | 0 | |||||||||
Separate Account Asset | 0 | 0 | ||||||||
Total assets measured at fair value | 2,661 | [2] | 2,267 | [1] | ||||||
Investment derivative instruments, liabilities | 0 | 0 | ||||||||
Other derivative instruments, liability | 0 | |||||||||
Liabilities Related to Investment Contracts, Fair Value Disclosure | 818 | 1,089 | ||||||||
Fair Value, Recurring [Member] | Level 3 | U.S. Treasury / Agency | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 0 | 0 | ||||||||
Fair Value, Recurring [Member] | Level 3 | Non-U.S. | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 660 | 546 | ||||||||
Fair Value, Recurring [Member] | Level 3 | Corporate and asset-backed securities | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 1,859 | 1,573 | ||||||||
Fair Value, Recurring [Member] | Level 3 | Mortgage-backed securities | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 53 | 60 | ||||||||
Fair Value, Recurring [Member] | Level 3 | Municipal | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 0 | 0 | ||||||||
Fair Value, Recurring [Member] | Level 3 | GLB | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross | 818 | 1,089 | [3] | |||||||
Fair Value, Recurring [Member] | Estimate of Fair Value Measurement [Member] | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 92,685 | 90,699 | ||||||||
Equity securities, at fair value | 4,557 | 4,027 | ||||||||
Short-term investments | 3,529 | 4,345 | ||||||||
Other investments, at fair value | 760 | 882 | [1] | |||||||
Securities lending collateral | 2,368 | 1,844 | ||||||||
Investment derivative instruments, assets | 97 | 35 | ||||||||
Other Derivative Instruments Fair Value | 35 | |||||||||
Separate Account Asset | 5,330 | 4,388 | ||||||||
Total assets measured at fair value | 109,361 | [2] | 106,220 | [1] | ||||||
Investment derivative instruments, liabilities | 111 | 52 | ||||||||
Other derivative instruments, liability | 17 | |||||||||
Liabilities Related to Investment Contracts, Fair Value Disclosure | 929 | 1,158 | ||||||||
Fair Value, Recurring [Member] | Estimate of Fair Value Measurement [Member] | U.S. Treasury / Agency | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 2,287 | 2,670 | ||||||||
Fair Value, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Non-U.S. | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 25,927 | 26,354 | ||||||||
Fair Value, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Corporate and asset-backed securities | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 38,716 | 36,331 | ||||||||
Fair Value, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Mortgage-backed securities | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 19,963 | 18,470 | ||||||||
Fair Value, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Municipal | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Available for sale, Fair Value | 5,792 | 6,874 | ||||||||
Fair Value, Recurring [Member] | Estimate of Fair Value Measurement [Member] | GLB | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross | 818 | 1,089 | [3] | |||||||
Investment Funds Limited Partnerships Partially Owned Investment Companies Fair Value [Member] | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Other investments, at fair value | 9,768 | 6,770 | ||||||||
Policy Loans [Member] | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Other investments, at fair value | 235 | 233 | ||||||||
Other Investments [Member] | ||||||||||
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||||||||||
Other investments, at fair value | $ 80 | $ 60 | ||||||||
|
Fair Value Measurements (Schedule Of Significant Unobservable Inputs Used In Level 3 Liability Valuations) (Detail) - USD ($) $ in Millions |
9 Months Ended | ||||||
---|---|---|---|---|---|---|---|
Sep. 30, 2021 |
Dec. 31, 2020 |
[2] | |||||
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | |||||||
Fair Value Measurements, Valuation Processes, Description | Actuarial model | ||||||
Weighted Average [Member] | |||||||
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | |||||||
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate | [1] | 4.60% | |||||
Significant Unobservable Inputs Annuitization Rate | [1] | 3.50% | |||||
Minimum [Member] | |||||||
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | |||||||
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate | 3.00% | ||||||
Significant Unobservable Inputs Annuitization Rate | 0.00% | ||||||
Maximum [Member] | |||||||
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | |||||||
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate | 34.00% | ||||||
Significant Unobservable Inputs Annuitization Rate | 100.00% | ||||||
Level 3 | Fair Value, Recurring [Member] | GLB | |||||||
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | |||||||
Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross | $ 818 | $ 1,089 | |||||
|
Fair Value Measurements (Assets and Liabilities, Measured At Fair Value Using Significant Unobservable Inputs) (Detail) - Level 3 - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
|||||||||
Equity Securities [Member] | ||||||||||||
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||||||||||||
Balance- Beginning of Period, Assets | $ 78 | $ 64 | $ 73 | $ 69 | ||||||||
Transfers Into Level 3, Asset | 0 | 0 | 0 | |||||||||
Transfers out of Level 3, Assets | 0 | 0 | 0 | 0 | ||||||||
Change in Net Unrealized Gains (Losses) included in OCI, Assets | 0 | 0 | 0 | 0 | ||||||||
Net Realized Gains/ (Losses), Assets | 1 | 2 | 8 | (1) | ||||||||
Purchases, Assets | 4 | 3 | 11 | 14 | ||||||||
Sales, Assets | (4) | (3) | (13) | (16) | ||||||||
Settlements, Assets | 0 | 0 | 0 | 0 | ||||||||
Other, Assets | 0 | 0 | 0 | 0 | ||||||||
Balance-End of Period, Assets | 79 | 66 | 79 | 66 | ||||||||
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date, Assets | (1) | 2 | 5 | 1 | ||||||||
Change in Net Unrealized Gains/Losses included in OCI at the Balance Sheet Date, Assets | 0 | 0 | 0 | 0 | ||||||||
Short-term Investments [Member] | ||||||||||||
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||||||||||||
Balance- Beginning of Period, Assets | 3 | 2 | 5 | 6 | ||||||||
Transfers Into Level 3, Asset | 0 | 0 | 0 | |||||||||
Transfers out of Level 3, Assets | 0 | 0 | 0 | 0 | ||||||||
Change in Net Unrealized Gains (Losses) included in OCI, Assets | 0 | (1) | 0 | (1) | ||||||||
Net Realized Gains/ (Losses), Assets | 0 | 0 | 0 | 0 | ||||||||
Purchases, Assets | 7 | 7 | 10 | 9 | ||||||||
Sales, Assets | 0 | 0 | 0 | 0 | ||||||||
Settlements, Assets | 0 | (1) | (5) | (7) | ||||||||
Other, Assets | 0 | 0 | 0 | 0 | ||||||||
Balance-End of Period, Assets | 10 | 7 | 10 | 7 | ||||||||
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date, Assets | 0 | 0 | 0 | 0 | ||||||||
Change in Net Unrealized Gains/Losses included in OCI at the Balance Sheet Date, Assets | 0 | (1) | 0 | (1) | ||||||||
Other Investments [Member] | ||||||||||||
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||||||||||||
Balance- Beginning of Period, Assets | 10 | 10 | 10 | 10 | ||||||||
Transfers Into Level 3, Asset | 0 | 0 | 0 | |||||||||
Transfers out of Level 3, Assets | (10) | 0 | (10) | 0 | ||||||||
Change in Net Unrealized Gains (Losses) included in OCI, Assets | 0 | 0 | 0 | 0 | ||||||||
Net Realized Gains/ (Losses), Assets | 0 | 0 | 0 | 0 | ||||||||
Purchases, Assets | 0 | 0 | 0 | 0 | ||||||||
Sales, Assets | 0 | 0 | 0 | 0 | ||||||||
Settlements, Assets | 0 | 0 | 0 | 0 | ||||||||
Other, Assets | 0 | 0 | 0 | 0 | ||||||||
Balance-End of Period, Assets | 0 | 10 | 0 | 10 | ||||||||
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date, Assets | 0 | 0 | 0 | 0 | ||||||||
Change in Net Unrealized Gains/Losses included in OCI at the Balance Sheet Date, Assets | 0 | 0 | 0 | 0 | ||||||||
Available-for-sale Securities [Member] | Non-U.S. | ||||||||||||
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||||||||||||
Balance- Beginning of Period, Assets | 642 | 469 | 546 | 449 | ||||||||
Transfers Into Level 3, Asset | 22 | 22 | 0 | |||||||||
Transfers out of Level 3, Assets | 0 | 0 | (10) | (16) | ||||||||
Change in Net Unrealized Gains (Losses) included in OCI, Assets | (15) | 21 | (2) | 1 | ||||||||
Net Realized Gains/ (Losses), Assets | (3) | 1 | 0 | (2) | ||||||||
Purchases, Assets | 60 | 41 | 235 | 190 | ||||||||
Sales, Assets | (19) | (19) | (35) | (81) | ||||||||
Settlements, Assets | (27) | (19) | (96) | (47) | ||||||||
Other, Assets | 0 | 0 | 0 | 0 | ||||||||
Balance-End of Period, Assets | 660 | 494 | 660 | 494 | ||||||||
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date, Assets | 0 | 0 | 0 | 0 | ||||||||
Change in Net Unrealized Gains/Losses included in OCI at the Balance Sheet Date, Assets | (15) | 20 | 2 | 0 | ||||||||
Available-for-sale Securities [Member] | Corporate and asset-backed securities | ||||||||||||
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||||||||||||
Balance- Beginning of Period, Assets | 1,688 | 1,369 | 1,573 | 1,451 | ||||||||
Transfers Into Level 3, Asset | 45 | 91 | 92 | |||||||||
Transfers out of Level 3, Assets | 0 | (1) | (3) | (73) | ||||||||
Change in Net Unrealized Gains (Losses) included in OCI, Assets | 2 | (13) | 14 | (31) | ||||||||
Net Realized Gains/ (Losses), Assets | 0 | 3 | 3 | (23) | ||||||||
Purchases, Assets | 272 | 194 | 681 | 416 | ||||||||
Sales, Assets | (13) | (80) | (88) | (147) | ||||||||
Settlements, Assets | (135) | (54) | (412) | (240) | ||||||||
Other, Assets | 0 | 0 | 0 | 0 | ||||||||
Balance-End of Period, Assets | 1,859 | 1,445 | 1,859 | 1,445 | ||||||||
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date, Assets | 0 | 3 | 3 | (6) | ||||||||
Change in Net Unrealized Gains/Losses included in OCI at the Balance Sheet Date, Assets | 0 | 12 | 17 | (25) | ||||||||
Available-for-sale Securities [Member] | Mortgage-backed securities | ||||||||||||
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||||||||||||
Balance- Beginning of Period, Assets | 47 | 60 | 60 | 60 | ||||||||
Transfers Into Level 3, Asset | 0 | 0 | 0 | |||||||||
Transfers out of Level 3, Assets | 0 | 0 | 0 | 0 | ||||||||
Change in Net Unrealized Gains (Losses) included in OCI, Assets | 0 | 0 | 0 | 0 | ||||||||
Net Realized Gains/ (Losses), Assets | 0 | 0 | 0 | 0 | ||||||||
Purchases, Assets | 17 | 2 | 18 | 2 | ||||||||
Sales, Assets | 0 | 0 | (1) | 0 | ||||||||
Settlements, Assets | (11) | (1) | (24) | (1) | ||||||||
Other, Assets | 0 | 0 | 0 | 0 | ||||||||
Balance-End of Period, Assets | 53 | 61 | 53 | 61 | ||||||||
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date, Assets | 0 | 0 | 0 | 0 | ||||||||
Change in Net Unrealized Gains/Losses included in OCI at the Balance Sheet Date, Assets | 0 | 0 | 0 | 0 | ||||||||
Guaranteed Minimum Income Benefit [Member] | ||||||||||||
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||||||||||||
Balance - Beginning of Period, Liabilities | 760 | [1] | 1,372 | [2] | 1,089 | 897 | ||||||
Transfers into level 3, liability | 0 | 0 | 0 | |||||||||
Transfers out of Level 3, Liabilities | 0 | 0 | 0 | 0 | ||||||||
Change in Net Unrealized Gains (losses) included in OCI, Liabilities | 0 | 0 | 0 | 0 | ||||||||
Net Realized Gains/(Losses), Liabilities | 59 | [1] | (46) | [2] | (252) | 426 | ||||||
Purchases, Liabilities | 0 | 0 | 0 | 0 | ||||||||
Sales, Liabilities | 0 | 0 | 0 | 0 | ||||||||
Settlements, Liabilities | 0 | 0 | 0 | 0 | ||||||||
Other, Liabilities | (1) | (8) | (19) | (5) | ||||||||
Balance - End of Period, Liabilities | 818 | [1] | 1,318 | [2] | 818 | [1] | 1,318 | [2] | ||||
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date, Liabilities | 59 | [1] | (46) | [2] | (252) | 426 | ||||||
Change in Net Unrealized Gains/Losses included in OCI at the Balance Sheet Date, Liabilities | $ 0 | $ 0 | $ 0 | $ 0 | ||||||||
|
Fair Value Measurements (Carrying Values And Fair Values Of Financial Instruments Not Measured At Fair Value) (Detail) - USD ($) $ in Millions |
Sep. 30, 2021 |
Dec. 31, 2020 |
---|---|---|
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | $ 11,119 | $ 12,510 |
Debt Securities, Held-to-maturity | 10,550 | 11,697 |
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] | ||
Repurchase agreements | 1,406 | 1,405 |
Long-term debt | 14,823 | 14,948 |
Total liabilities | 139,736 | 131,333 |
Level 1 | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 1,195 | 1,395 |
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] | ||
Repurchase agreements | 0 | 0 |
Long-term Debt, Fair Value | 0 | 0 |
Trust preferred securities | 0 | 0 |
Total liabilities | 0 | 0 |
Level 2 | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 9,924 | 11,115 |
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] | ||
Repurchase agreements | 1,406 | 1,405 |
Long-term Debt, Fair Value | 16,648 | 17,487 |
Trust preferred securities | 465 | 473 |
Total liabilities | 18,519 | 19,365 |
Level 3 | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 0 | 0 |
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] | ||
Repurchase agreements | 0 | 0 |
Long-term Debt, Fair Value | 0 | 0 |
Trust preferred securities | 0 | 0 |
Total liabilities | 0 | 0 |
Estimate of Fair Value Measurement [Member] | ||
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] | ||
Repurchase agreements | 1,406 | 1,405 |
Long-term Debt, Fair Value | 16,648 | 17,487 |
Trust preferred securities | 465 | 473 |
Total liabilities | 18,519 | 19,365 |
Reported Value Measurement [Member] | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Debt Securities, Held-to-maturity | 10,515 | 11,653 |
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] | ||
Repurchase agreements | 1,406 | 1,405 |
Trust preferred securities | 308 | 308 |
Long-term debt | 14,823 | 14,948 |
Total liabilities | 16,537 | 16,661 |
U.S. Treasury / Agency | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 1,247 | 1,452 |
Debt Securities, Held-to-maturity | 1,209 | 1,392 |
U.S. Treasury / Agency | Level 1 | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 1,195 | 1,395 |
U.S. Treasury / Agency | Level 2 | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 52 | 57 |
U.S. Treasury / Agency | Level 3 | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 0 | 0 |
U.S. Treasury / Agency | Reported Value Measurement [Member] | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Debt Securities, Held-to-maturity | 1,209 | 1,392 |
Non-U.S. | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 1,330 | 1,405 |
Debt Securities, Held-to-maturity | 1,259 | 1,295 |
Non-U.S. | Level 1 | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 0 | 0 |
Non-U.S. | Level 2 | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 1,330 | 1,405 |
Non-U.S. | Level 3 | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 0 | 0 |
Non-U.S. | Reported Value Measurement [Member] | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Debt Securities, Held-to-maturity | 1,254 | 1,288 |
Corporate and asset-backed securities | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 2,260 | 2,438 |
Debt Securities, Held-to-maturity | 2,079 | 2,185 |
Corporate and asset-backed securities | Level 1 | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 0 | 0 |
Corporate and asset-backed securities | Level 2 | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 2,260 | 2,438 |
Corporate and asset-backed securities | Level 3 | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 0 | 0 |
Corporate and asset-backed securities | Reported Value Measurement [Member] | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Debt Securities, Held-to-maturity | 2,051 | 2,150 |
Mortgage-backed securities | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 1,868 | 2,146 |
Debt Securities, Held-to-maturity | 1,771 | 2,000 |
Mortgage-backed securities | Level 1 | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 0 | 0 |
Mortgage-backed securities | Level 2 | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 1,868 | 2,146 |
Mortgage-backed securities | Level 3 | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 0 | 0 |
Mortgage-backed securities | Reported Value Measurement [Member] | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Debt Securities, Held-to-maturity | 1,770 | 1,999 |
Municipal | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 4,414 | 5,069 |
Debt Securities, Held-to-maturity | 4,232 | 4,825 |
Municipal | Level 1 | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 0 | 0 |
Municipal | Level 2 | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 4,414 | 5,069 |
Municipal | Level 3 | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Held to maturity, Fair Value | 0 | 0 |
Municipal | Reported Value Measurement [Member] | ||
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | ||
Debt Securities, Held-to-maturity | $ 4,231 | $ 4,824 |
Reinsurance (Reinsurance Recoverable on Ceded Reinsurance) (Details) - USD ($) $ in Millions |
Sep. 30, 2021 |
Dec. 31, 2020 |
Sep. 30, 2020 |
Dec. 31, 2019 |
||||
---|---|---|---|---|---|---|---|---|
Ceded Credit Risk [Line Items] | ||||||||
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments | $ 15,550 | [1] | $ 14,647 | $ 14,767 | [1] | $ 14,181 | ||
Reinsurance Recoverable for Paid Claims and Claims Adjustments | 1,098 | 945 | ||||||
Reinsurance recoverable on losses and loss expenses, net of valuation allowance - $325 and $314 | 16,648 | 15,592 | ||||||
Reinsurance recoverable on policy benefits | 206 | 206 | ||||||
Reinsurance Recoverables on Unpaid Losses, Allowance | 269 | 257 | ||||||
Reinsurance Recoverables on Paid Losses, Allowance | 56 | 57 | ||||||
Reinsurance Recoverable, Allowance for Credit Loss | 325 | 314 | $ 320 | $ 316 | ||||
Reinsurance Recoverables on Future Policy Benefits, Allowance | $ 4 | $ 5 | ||||||
|
Reinsurance (Details) - USD ($) $ in Millions |
9 Months Ended | |
---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
|
Reinsurance Recoverable, Allowance for Credit Loss [Roll Forward] | ||
Reinsurance Recoverable, Allowance for Credit Loss, Beginning of period | $ 314 | $ 316 |
Reinsurance Recoverable, Credit Loss Expense (Reversal) | 16 | 21 |
Reinsurance, Loss on Uncollectible Accounts in Period, Amount | (4) | (19) |
Reinsurance Recoverable, Allowance for Credit Loss, Other | (1) | 2 |
Reinsurance Recoverable, Allowance for Credit Loss, end of period | $ 325 | $ 320 |
Unpaid losses and loss expenses (RF) (Details) - USD ($) $ in Millions |
9 Months Ended | |||||
---|---|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
|||||
Unpaid Losses and Loss Expenses [Roll Forward] | ||||||
Gross unpaid losses and loss expenses – beginning of period | $ 67,811 | $ 62,690 | ||||
Reinsurance recoverable on unpaid losses – beginning of period (1) | (14,647) | (14,181) | ||||
Net unpaid losses and loss expenses – beginning of period | 53,164 | 48,509 | ||||
Current Year Claims and Claims Adjustment Expense | 17,556 | 17,109 | ||||
Prior Year Claims and Claims Adjustment Expense | [1] | (868) | (212) | |||
Total, Incurred | 16,688 | 16,897 | ||||
Net loss and loss expenses paid, Current Year | 4,771 | 4,766 | ||||
Net loss and loss expenses paid, Prior Years | 7,922 | 7,597 | ||||
Total, Paid | 12,693 | 12,363 | ||||
Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Revaluation And Other | (78) | 95 | ||||
Net unpaid losses and loss expenses – end of period | 57,081 | 53,138 | ||||
Reinsurance recoverable on unpaid losses (1) | [2] | 15,550 | 14,767 | |||
Gross unpaid losses and loss expenses – end of period | 72,631 | 67,905 | ||||
prior period development, net adjustments | 87 | $ 23 | ||||
Liability for Unpaid Claims and Claims Adjustment Expense, Period Increase (Decrease), Gross | 4,820 | |||||
Liability for Unpaid Claims and Claims Adjustment Expense, Period Increase (Decrease) | $ 3,917 | |||||
|
Unpaid losses and loss expenses Unpaid losses and loss expenses (PPD table) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
|
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | $ (321) | $ (146) | $ (781) | $ (189) |
North America Commercial P&C Insurance [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (157) | (200) | (440) | (451) |
North America Personal P&C Insurance [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (182) | 48 | (266) | 48 |
North American Agriculture Insurance [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 7 | 18 | 5 | 4 |
Overseas General Insurance [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (28) | (60) | (209) | (100) |
Global Reinsurance [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (4) | (6) | (11) | (29) |
Corporate Segment [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 43 | 54 | 140 | 339 |
Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (246) | 132 | (644) | 8 |
Short Tail [Member] | North America Commercial P&C Insurance [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (56) | 55 | (197) | (12) |
Short Tail [Member] | North America Personal P&C Insurance [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (182) | 48 | (266) | 48 |
Short Tail [Member] | North American Agriculture Insurance [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 7 | 18 | 5 | 4 |
Short Tail [Member] | Overseas General Insurance [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (15) | 11 | (201) | (28) |
Short Tail [Member] | Global Reinsurance [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 0 | 0 | 15 | (4) |
Short Tail [Member] | Corporate Segment [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 0 | 0 | 0 | 0 |
Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (75) | (278) | (137) | (197) |
Long Tail [Member] | North America Commercial P&C Insurance [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (101) | (255) | (243) | (439) |
Long Tail [Member] | North America Personal P&C Insurance [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 0 | 0 | 0 | 0 |
Long Tail [Member] | North American Agriculture Insurance [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 0 | 0 | 0 | 0 |
Long Tail [Member] | Overseas General Insurance [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (13) | (71) | (8) | (72) |
Long Tail [Member] | Global Reinsurance [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (4) | (6) | (26) | (25) |
Long Tail [Member] | Corporate Segment [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | $ 43 | $ 54 | $ 140 | $ 339 |
Unpaid losses and loss expenses Unpaid losses and loss expenses (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
|
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | $ (321) | $ (146) | $ (781) | $ (189) |
Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (75) | (278) | (137) | (197) |
Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (246) | 132 | (644) | 8 |
North America Commercial P&C Insurance [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (157) | (200) | (440) | (451) |
North America Commercial P&C Insurance [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (101) | (255) | (243) | (439) |
North America Commercial P&C Insurance [Member] | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (56) | 55 | (197) | (12) |
North America Commercial P&C Insurance [Member] | Workers' Compensation Insurance [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (255) | (337) | ||
North America Commercial P&C Insurance [Member] | Other [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 5 | |||
North America Commercial P&C Insurance [Member] | Multi-Line | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 46 | 26 | ||
North America Commercial P&C Insurance [Member] | Accident years 2015 to 2019 [Member] | Auto Liability [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 75 | |||
North America Commercial P&C Insurance [Member] | Accident years 2016 and prior [Member] | Professional Malpractice Liability Insurance [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (66) | |||
North America Commercial P&C Insurance [Member] | Accident years 2016 and prior [Member] | Environmental lines [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (43) | |||
North America Commercial P&C Insurance [Member] | Accident years 2016 and prior [Member] | General Liability [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 29 | |||
North America Commercial P&C Insurance [Member] | Accident years 2016 and prior [Member] | Workers' Compensation Insurance [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (97) | (155) | ||
North America Commercial P&C Insurance [Member] | Accident years 2016 and prior [Member] | Multi-Line | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (41) | (41) | ||
North America Commercial P&C Insurance [Member] | Accident Years 2016 - 2019 [Member] | Commercial Excess and Umbrella [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 74 | |||
North America Commercial P&C Insurance [Member] | Accident year 2017 and prior [Member] | General Liability [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (37) | |||
North America Commercial P&C Insurance [Member] | Short-duration Insurance Contracts, Accident Year 2018 [Member] | Surety Product Line [Member] | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (31) | |||
North America Commercial P&C Insurance [Member] | Accident years 2018 - 2019 [Member] | Accident and Health Insurance Product Line [Member] | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (37) | |||
North America Commercial P&C Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2019 [Member] | Workers' Compensation Insurance [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (62) | |||
North America Commercial P&C Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2019 [Member] | Marine [Member] | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 21 | |||
North America Commercial P&C Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2019 [Member] | Property Insurance [Member] | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 35 | |||
North America Commercial P&C Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2020 | Workers' Compensation Insurance [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (36) | |||
North America Commercial P&C Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2020 | Property and Inland Marine [Member] | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (83) | |||
North America Commercial P&C Insurance [Member] | Accident Years 2019 - 2020 | First Party Cyber risk [Member] | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 41 | |||
North America Commercial P&C Insurance [Member] | Accident Years 2019 - 2020 | Accident and Health Insurance Product Line [Member] | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (46) | |||
North America Commercial P&C Insurance [Member] | Accident years 2018 - 2020 [Member] | Surety Product Line [Member] | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (89) | |||
North America Commercial P&C Insurance [Member] | Accident years 2017 and prior | Environmental lines [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (40) | |||
North America Commercial P&C Insurance [Member] | Accident years 2017 and prior | Multi-Line | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (36) | (36) | ||
North America Commercial P&C Insurance [Member] | Accident years 2016 to 2020 | General Liability [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 26 | |||
North America Commercial P&C Insurance [Member] | Accident years 2016 and 2017 | Professional Malpractice Liability Insurance [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (51) | |||
North America Commercial P&C Insurance [Member] | Accident years 2017 and 2019 | Auto Liability [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 74 | |||
North America Commercial P&C Insurance [Member] | Accident years 2018 and 2019 | Commercial Excess and Umbrella [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 31 | |||
North America Commercial P&C Insurance [Member] | Accident years 2019 and 2020 | Property and Inland Marine [Member] | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (54) | |||
North America Commercial P&C Insurance [Member] | Short-duration Insurance Contracts, Accident Year 2016 [Member] | Foreign Casualty Line | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (40) | (40) | ||
North America Commercial P&C Insurance [Member] | Accident years 2014 and prior, and accident year 2019 | Commercial Excess and Umbrella [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (47) | |||
North America Agricultural Insurance [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 7 | 18 | 5 | 4 |
North America Agricultural Insurance [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 0 | 0 | 0 | 0 |
North America Agricultural Insurance [Member] | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 7 | 18 | 5 | 4 |
Corporate Segment [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 43 | 54 | 140 | 339 |
Corporate Segment [Member] | Environmental Issue [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 33 | 35 | ||
Corporate Segment [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 43 | 54 | 140 | 339 |
Corporate Segment [Member] | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 0 | 0 | 0 | 0 |
Corporate Segment [Member] | Other [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 68 | 254 | ||
Overseas General Insurance [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (28) | (60) | (209) | (100) |
Overseas General Insurance [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (13) | (71) | (8) | (72) |
Overseas General Insurance [Member] | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (15) | 11 | (201) | (28) |
Overseas General Insurance [Member] | Financial [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 57 | |||
Overseas General Insurance [Member] | Casualty lines | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (72) | (94) | ||
Overseas General Insurance [Member] | Accident years 2016 and prior [Member] | Casualty lines | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (143) | |||
Overseas General Insurance [Member] | Accident Years 2016 - 2019 [Member] | Financial [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 125 | |||
Overseas General Insurance [Member] | Accident year 2017 - 2018 [Member] | Marine [Member] | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (22) | |||
Overseas General Insurance [Member] | Accident Years 2017 to 2019 [Member] | Casualty lines | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 49 | |||
Overseas General Insurance [Member] | Accident years 2018 - 2019 [Member] | Political Risk | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (22) | |||
Overseas General Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2020 | Property, Liability and Casualty Insurance Product Line | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (21) | |||
Overseas General Insurance [Member] | Accident Years 2019 - 2020 | Accident and Health Insurance Product Line [Member] | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (55) | |||
Overseas General Insurance [Member] | Accident Years 2019 - 2020 | Property, Liability and Casualty Insurance Product Line | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (54) | |||
Overseas General Insurance [Member] | Accident years 2017 and prior | Casualty lines | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (97) | |||
Overseas General Insurance [Member] | Accident years 2017 and prior | Environment and Political Risk | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (24) | |||
Overseas General Insurance [Member] | Accident years 2018 - 2020 | Marine [Member] | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (35) | |||
Overseas General Insurance [Member] | Accident years 2018 - 2020 | Casualty lines | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 25 | |||
Overseas General Insurance [Member] | Accident Year 2015 and prior | Financial [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (68) | |||
Overseas General Insurance [Member] | Accident years 2011 - 2020 | Financial [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 84 | |||
North America Personal P&C Insurance [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (182) | 48 | (266) | 48 |
North America Personal P&C Insurance [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 0 | 0 | 0 | 0 |
North America Personal P&C Insurance [Member] | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (182) | 48 | (266) | 48 |
North America Personal P&C Insurance [Member] | Short-duration Insurance Contracts, Accident Year 2017 [Member] | Personal Lines | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (22) | |||
North America Personal P&C Insurance [Member] | Accident Years 2017 to 2019 [Member] | Homeowners and Valuables | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | 69 | |||
North America Personal P&C Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2020 | Auto Liability [Member] | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (43) | |||
North America Personal P&C Insurance [Member] | Short-Duration Insurance Contract, Accident Year 2020 | Homeowners and Valuables | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (176) | (216) | ||
Global Reinsurance [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (4) | (6) | (11) | (29) |
Global Reinsurance [Member] | Long Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | (4) | (6) | (26) | (25) |
Global Reinsurance [Member] | Short Tail [Member] | ||||
Liability for Claims and Claims Adjustment Expense [Line Items] | ||||
Net Prior Period Development | $ 0 | $ 0 | $ 15 | $ (4) |
Commitments, Contingencies, And Guarantees (Narrative) (Detail) - USD ($) $ in Millions |
Sep. 30, 2021 |
Dec. 31, 2020 |
---|---|---|
Financial Instruments Owned and Pledged as Collateral [Line Items] | ||
Derivative liability subject to a master netting agreement | $ 30 | |
Derivative Asset, subject to a master netting agreement | $ 22 | |
Repurchase agreements | 1,406 | 1,405 |
Purchase Commitment, Remaining Minimum Amount Committed | 825 | |
Carrying value of limited partnerships and partially-owned investment companies included in other investments | 9,500 | 6,500 |
Funding commitments relating to limited partnerships and partially-owned investment companies | 7,100 | 3,200 |
Unrecognized tax benefits | 62 | |
Operating Lease, Right-of-Use Asset | 434 | 473 |
Operating Lease, Liability | $ 472 | $ 517 |
Commitments, Contingencies, And Guarantees (Balance Sheet Locations, Fair Values In Asset Or (Liability) Position, And Notional Values/Payment Provisions Of Derivative Instruments) (Detail) - USD ($) $ in Millions |
Sep. 30, 2021 |
Dec. 31, 2020 |
||||||
---|---|---|---|---|---|---|---|---|
Foreign currency forward contracts | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Derivative, Notional Amount | $ 4,235 | $ 2,807 | ||||||
Options/Futures contracts on notes, bonds, and equities | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Derivative, Notional Amount | 13,005 | 1,749 | ||||||
Convertible securities | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Derivative, Notional Amount | [1] | 13 | 11 | |||||
Total investment and embedded derivative instruments | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Derivative Asset, Fair Value, Gross Asset | 109 | 44 | ||||||
Fair Value, Liability | (111) | (52) | ||||||
Derivative, Notional Amount | 17,253 | 4,567 | ||||||
Futures contracts on equities | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Derivative, Notional Amount | [2] | 867 | 709 | |||||
Other | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Derivative, Notional Amount | 157 | 16 | ||||||
Other Derivative Instruments [Member] | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Derivative, Notional Amount | 1,024 | 725 | ||||||
Guaranteed Minimum Income Benefit [Member] | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Derivative Asset, Fair Value, Gross Asset | [3] | 0 | 0 | |||||
Derivative, Notional Amount | [3] | 1,539 | 1,658 | |||||
Other Assets [Member] | Foreign currency forward contracts | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Derivative Asset, Fair Value, Gross Asset | 22 | 22 | ||||||
Other Assets [Member] | Options/Futures contracts on notes, bonds, and equities | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Derivative Asset, Fair Value, Gross Asset | 75 | 13 | ||||||
Other Assets [Member] | Futures contracts on equities | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Derivative Asset, Fair Value, Gross Asset | [2] | 35 | 0 | |||||
Other Assets [Member] | Other | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Derivative Asset, Fair Value, Gross Asset | 0 | 0 | ||||||
Other Assets [Member] | Other Derivative Instruments [Member] | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Derivative Asset, Fair Value, Gross Asset | 35 | 0 | ||||||
Fixed Maturities [Member] | Convertible securities | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Derivative Asset, Fair Value, Gross Asset | [1] | 12 | 9 | |||||
Equity Securities [Member] | Convertible securities | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Fair Value, Liability | [1] | 0 | 0 | |||||
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Foreign currency forward contracts | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Fair Value, Liability | (89) | (49) | ||||||
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Options/Futures contracts on notes, bonds, and equities | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Fair Value, Liability | (22) | (3) | ||||||
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Futures contracts on equities | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Fair Value, Liability | [2] | 0 | (17) | |||||
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Other | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Fair Value, Liability | 0 | 0 | ||||||
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Other Derivative Instruments [Member] | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Fair Value, Liability | 0 | (17) | ||||||
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Guaranteed Minimum Income Benefit [Member] | ||||||||
Derivatives, Fair Value [Line Items] | ||||||||
Fair Value, Liability | [3] | $ (818) | $ (1,089) | |||||
|
Commitments, Contingencies, And Guarantees (Net Realized Gains (Losses) Of Derivative Instrument Activity In Consolidated Statement Of Operations) (Detail) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||||
---|---|---|---|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
|||||
Derivative Instruments, Gain (Loss) [Line Items] | ||||||||
Gain (Loss) on Derivative | $ (82) | $ 4 | $ 141 | $ (420) | ||||
Foreign currency forward contracts | ||||||||
Derivative Instruments, Gain (Loss) [Line Items] | ||||||||
Gain (Loss) on Derivative | (15) | 0 | (37) | 53 | ||||
All Other Futures Contracts, Options and equities [Member] | ||||||||
Derivative Instruments, Gain (Loss) [Line Items] | ||||||||
Gain (Loss) on Derivative | 6 | 9 | 45 | (15) | ||||
Convertible securities | ||||||||
Derivative Instruments, Gain (Loss) [Line Items] | ||||||||
Gain (Loss) on Derivative | [1] | 0 | 0 | 1 | 0 | |||
Total investment and embedded derivative instruments | ||||||||
Derivative Instruments, Gain (Loss) [Line Items] | ||||||||
Gain (Loss) on Derivative | (9) | 9 | 9 | 38 | ||||
GLB | ||||||||
Derivative Instruments, Gain (Loss) [Line Items] | ||||||||
Gain (Loss) on Derivative | (59) | 46 | 252 | (426) | ||||
Futures contracts on equities | ||||||||
Derivative Instruments, Gain (Loss) [Line Items] | ||||||||
Gain (Loss) on Derivative | [2] | (4) | (52) | (112) | (30) | |||
Other | ||||||||
Derivative Instruments, Gain (Loss) [Line Items] | ||||||||
Gain (Loss) on Derivative | (10) | 1 | (8) | (2) | ||||
Guaranteed Living Benefit And Other Derivative Instruments [Member] | ||||||||
Derivative Instruments, Gain (Loss) [Line Items] | ||||||||
Gain (Loss) on Derivative | $ (73) | $ (5) | $ 132 | $ (458) | ||||
|
Commitments, contingencies, and guarantees Commitments, Contingencies, And Guarantees (Transactions accounted for as secured borrowings) (Details) - USD ($) $ in Millions |
Sep. 30, 2021 |
Dec. 31, 2020 |
---|---|---|
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||
Securities lending collateral | $ 2,368 | $ 1,844 |
Securities lending payable | 2,368 | 1,844 |
Cash [Member] | Overnight and Continuous [Member] | ||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||
Securities lending collateral | 1,402 | 551 |
U.S. Treasury / Agency | Overnight and Continuous [Member] | ||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||
Securities lending collateral | 119 | 148 |
Foreign [Member] | Overnight and Continuous [Member] | ||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||
Securities lending collateral | 833 | 1,032 |
Corporate and asset-backed securities | Overnight and Continuous [Member] | ||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||
Securities lending collateral | 11 | 30 |
Mortgage-backed securities | Overnight and Continuous [Member] | ||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||
Securities lending collateral | 1 | 4 |
Equity Securities [Member] | Overnight and Continuous [Member] | ||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||
Securities lending collateral | 1 | 79 |
Municipal | Overnight and Continuous [Member] | ||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||
Securities lending collateral | $ 1 | $ 0 |
Commitments, contingencies, and guarantees Commitments, Contingencies, And Guarantees (Collateral pledged under repurchase agreements) (Details) - USD ($) $ in Millions |
Sep. 30, 2021 |
Dec. 31, 2020 |
||
---|---|---|---|---|
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||||
Assets pledged under repurchase agreements | $ 1,425 | $ 1,462 | ||
Repurchase agreements | 1,406 | 1,405 | ||
Cash [Member] | ||||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||||
Assets pledged under repurchase agreements | 0 | 4 | ||
U.S. Treasury / Agency | ||||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||||
Assets pledged under repurchase agreements | 104 | 106 | ||
Mortgage-backed securities | ||||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||||
Assets pledged under repurchase agreements | 1,321 | 1,352 | ||
Repurchase Agreements [Member] | ||||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||||
Secured Borrowings, Gross, Difference, Amount | [1] | 19 | 57 | |
Maturity 30 to 90 Days [Member] | ||||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||||
Assets pledged under repurchase agreements | 475 | 481 | ||
Maturity 30 to 90 Days [Member] | Cash [Member] | ||||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||||
Assets pledged under repurchase agreements | 0 | 0 | ||
Maturity 30 to 90 Days [Member] | U.S. Treasury / Agency | ||||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||||
Assets pledged under repurchase agreements | 0 | 0 | ||
Maturity 30 to 90 Days [Member] | Mortgage-backed securities | ||||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||||
Assets pledged under repurchase agreements | 475 | 481 | ||
Maturity Greater than 90 Days [Member] | ||||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||||
Assets pledged under repurchase agreements | 950 | 981 | ||
Maturity Greater than 90 Days [Member] | Cash [Member] | ||||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||||
Assets pledged under repurchase agreements | 0 | 4 | ||
Maturity Greater than 90 Days [Member] | U.S. Treasury / Agency | ||||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||||
Assets pledged under repurchase agreements | 104 | 106 | ||
Maturity Greater than 90 Days [Member] | Mortgage-backed securities | ||||
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] | ||||
Assets pledged under repurchase agreements | $ 846 | $ 871 | ||
|
Shareholders' equity (Details) |
9 Months Ended | |||||
---|---|---|---|---|---|---|
Aug. 04, 2021
shares
|
Sep. 30, 2021
SFr / shares
shares
|
May 20, 2021
$ / shares
|
Dec. 31, 2020
SFr / shares
shares
|
May 20, 2020
$ / shares
|
May 31, 2019
$ / shares
|
|
Stockholders' Equity Note [Abstract] | ||||||
Common Shares, par value | SFr / shares | SFr 24.15 | SFr 24.15 | ||||
Common Shares in treasury, shares | 43,144,862 | 26,872,639 | ||||
Treasury Stock, Shares, Retired | 3,584,150 | |||||
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures | 3,021,027 | |||||
Common Stock, Dividend Rate Approved | $ / shares | $ 0.80 | $ 0.78 | $ 0.75 | |||
Annual dividend per share approved by shareholders | $ / shares | $ 3.20 | $ 3.12 | $ 3.00 | |||
Nov 2020 Stock Repurchase Plan | ||||||
Stockholders' Equity Note [Abstract] | ||||||
Number of shares repurchased | 22,877,400 |
Shareholders' equity Dividends Declared (Details) |
3 Months Ended | 9 Months Ended | ||||||
---|---|---|---|---|---|---|---|---|
Sep. 30, 2021
SFr / shares
|
Sep. 30, 2021
$ / shares
|
Sep. 30, 2020
SFr / shares
|
Sep. 30, 2020
$ / shares
|
Sep. 30, 2021
SFr / shares
|
Sep. 30, 2021
$ / shares
|
Sep. 30, 2020
SFr / shares
|
Sep. 30, 2020
$ / shares
|
|
United States of America, Dollars | ||||||||
Equity, Class of Treasury Stock [Line Items] | ||||||||
Common Stock, Dividends, Per Share, Declared | $ / shares | $ 0.80 | $ 0.78 | $ 2.38 | $ 2.31 | ||||
Switzerland, Francs | ||||||||
Equity, Class of Treasury Stock [Line Items] | ||||||||
Common Stock, Dividends, Per Share, Declared | SFr / shares | SFr 0.73 | SFr 0.71 | SFr 2.14 | SFr 2.18 |
Shareholders' equity Share Repurchases (Details) - USD ($) $ in Millions |
1 Months Ended | 3 Months Ended | 9 Months Ended | ||||||
---|---|---|---|---|---|---|---|---|---|
Oct. 27, 2021 |
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
Jul. 19, 2021 |
Feb. 01, 2021 |
Nov. 19, 2020 |
Nov. 21, 2019 |
|
Nov 2019 Stock Repurchase Plan [Member] | |||||||||
Equity, Class of Treasury Stock [Line Items] | |||||||||
Stock Repurchase Program, Authorized Amount | $ 1,500 | ||||||||
Number of shares repurchased | 0 | 2,266,150 | |||||||
Cost of shares repurchased | $ 0 | $ 326 | |||||||
Repurchase authorization remaining at end of period | $ 1,124 | $ 1,124 | |||||||
Nov 2020 Stock Repurchase Plan | |||||||||
Equity, Class of Treasury Stock [Line Items] | |||||||||
Stock Repurchase Program, Authorized Amount | $ 2,500 | $ 1,500 | |||||||
Number of shares repurchased | 22,877,400 | ||||||||
Cost of shares repurchased | $ 3,956 | ||||||||
CB_Increase(Decrease)StockRepurchaseProgramAuthorizedAmount | $ 1,000 | ||||||||
July 2021 Stock Repurchase Plan | |||||||||
Equity, Class of Treasury Stock [Line Items] | |||||||||
Stock Repurchase Program, Authorized Amount | $ 5,000 | ||||||||
Number of shares repurchased | 8,412,000 | ||||||||
Cost of shares repurchased | $ 1,516 | ||||||||
Repurchase authorization remaining at end of period | $ 3,551 | $ 3,551 | |||||||
Subsequent Event [Member] | July 2021 Stock Repurchase Plan | |||||||||
Equity, Class of Treasury Stock [Line Items] | |||||||||
Number of shares repurchased | 167,700 | ||||||||
Cost of shares repurchased | $ 29 | ||||||||
Repurchase authorization remaining at end of period | $ 3,522 |
Share-Based Compensation (Detail) - $ / shares |
9 Months Ended | |
---|---|---|
Feb. 25, 2021 |
Sep. 30, 2021 |
|
Chubb Limited Amended 2016 Long-Term Incentive Plan | Common Stock [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized | 13,400,000 | |
Stock Options [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Award vesting period in years | 3 years | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period | 3 years | |
Award term period in years | 10 years | |
Stock options granted | 1,790,057 | |
Weighted-average grant date fair value for stock options granted | $ 33.05 | |
Restricted Stock [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Award vesting period in years | 4 years | |
Restricted stock awards granted to employees and officers of the company | 848,762 | |
Grant date fair value of awards except for options granted to employees and officers of the company | $ 164.94 | |
Performance Shares [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Award vesting period in years | 3 years | |
Restricted stock awards granted to employees and officers of the company | 284,766 | |
Grant date fair value of awards except for options granted to employees and officers of the company | $ 164.94 | |
Restricted Stock Units (RSUs) [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Award vesting period in years | 4 years | |
Restricted stock awards granted to employees and officers of the company | 324,142 | |
Grant date fair value of awards except for options granted to employees and officers of the company | $ 164.94 |
Postretirement benefits Components of net periodic benefit costs (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |||||
---|---|---|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
||||
Pension Plan [Member] | |||||||
Defined Benefit Plans and Other Postretirement Benefit Plans | |||||||
Service cost | $ 1 | $ 1 | $ 3 | $ 3 | |||
Non-service (benefit) cost | (50) | (35) | (153) | (104) | |||
Net periodic benefit cost (benefit) | (49) | (34) | (150) | (101) | |||
Other Postretirement Benefits Plan [Member] | |||||||
Defined Benefit Plans and Other Postretirement Benefit Plans | |||||||
Service cost | 1 | 0 | 1 | 0 | |||
Interest cost | 1 | 1 | 1 | 2 | |||
Expected return on plan assets | (1) | (1) | (1) | (3) | |||
Defined Benefit Plan, Amortization of Gain (Loss) | 0 | 0 | 0 | 0 | |||
Amortization of prior service cost | 0 | [1] | (20) | (26) | (60) | ||
Settlements | 0 | 0 | 0 | 0 | |||
Non-service (benefit) cost | 0 | (20) | (26) | (61) | |||
Net periodic benefit cost (benefit) | 1 | (20) | (25) | (61) | |||
Losses and loss expenses | Pension Plan [Member] | |||||||
Defined Benefit Plans and Other Postretirement Benefit Plans | |||||||
Service cost | 0 | 0 | 0 | 0 | |||
Non-service (benefit) cost | (5) | (3) | (14) | (9) | |||
Losses and loss expenses | Other Postretirement Benefits Plan [Member] | |||||||
Defined Benefit Plans and Other Postretirement Benefit Plans | |||||||
Service cost | 0 | 0 | 0 | 0 | |||
Non-service (benefit) cost | 0 | (2) | (3) | (6) | |||
Administrative Expense | Pension Plan [Member] | |||||||
Defined Benefit Plans and Other Postretirement Benefit Plans | |||||||
Service cost | 1 | 1 | 3 | 3 | |||
Non-service (benefit) cost | (45) | (32) | (139) | (95) | |||
Administrative Expense | Other Postretirement Benefits Plan [Member] | |||||||
Defined Benefit Plans and Other Postretirement Benefit Plans | |||||||
Service cost | 1 | 0 | 1 | 0 | |||
Non-service (benefit) cost | 0 | (18) | (23) | (55) | |||
Foreign Plan [Member] | Pension Plan [Member] | |||||||
Defined Benefit Plans and Other Postretirement Benefit Plans | |||||||
Service cost | 1 | 1 | 3 | 3 | |||
Interest cost | 5 | 6 | 14 | 17 | |||
Expected return on plan assets | (10) | (11) | (32) | (32) | |||
Defined Benefit Plan, Amortization of Gain (Loss) | 0 | 0 | 2 | 1 | |||
Amortization of prior service cost | 0 | 1 | 0 | 1 | |||
Settlements | 0 | 0 | 0 | 0 | |||
Non-service (benefit) cost | (5) | (4) | (16) | (13) | |||
Net periodic benefit cost (benefit) | (4) | (3) | (13) | (10) | |||
UNITED STATES | Pension Plan [Member] | |||||||
Defined Benefit Plans and Other Postretirement Benefit Plans | |||||||
Service cost | 0 | 0 | 0 | 0 | |||
Interest cost | 18 | 24 | 53 | 74 | |||
Expected return on plan assets | (64) | (56) | (191) | (168) | |||
Defined Benefit Plan, Amortization of Gain (Loss) | 0 | 0 | 0 | 0 | |||
Amortization of prior service cost | 0 | 0 | 0 | 0 | |||
Settlements | 1 | 1 | 1 | 3 | |||
Non-service (benefit) cost | (45) | (31) | (137) | (91) | |||
Net periodic benefit cost (benefit) | $ (45) | $ (31) | $ (137) | $ (91) | |||
|
Other Income and Expenses (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||||
---|---|---|---|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
|||||
Income (Loss) from Equity Method Investments | [1] | $ 802 | $ 479 | $ 2,073 | $ 435 | |||
Gains Losses On Fair Value Changes In Separate Account Assets | [2] | (24) | 24 | (5) | 8 | |||
Excise and Sales Taxes | (5) | (4) | (15) | (16) | ||||
Other Nonoperating Expense | (10) | (14) | (23) | (55) | ||||
Other Nonoperating Income (Expense) | 763 | 485 | 2,030 | 372 | ||||
Huatai Group [Member] | ||||||||
Income (Loss) from Equity Method Investments | $ 40 | $ 37 | $ 144 | $ 86 | ||||
|
Segment Information (Operations By Segment) (Detail) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |||||
---|---|---|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
||||
Segment Reporting Information [Line Items] | |||||||
Net premiums written | $ 10,510 | $ 9,078 | $ 28,718 | $ 25,410 | |||
Net premiums earned | 10,000 | 8,765 | 27,034 | 24,687 | |||
Losses and loss expenses | 6,629 | 5,835 | 16,688 | 16,897 | |||
Policy benefits | 151 | 198 | 503 | 550 | |||
Policy acquisition costs | 1,778 | 1,645 | 5,141 | 4,853 | |||
Administrative expenses | 806 | 733 | 2,325 | 2,201 | |||
Underwriting income (loss) | 636 | 354 | 2,377 | 186 | |||
Net investment income (loss) | 866 | 840 | 2,613 | 2,528 | |||
Other (income) expense | (763) | (485) | (2,030) | (372) | |||
Amortization of purchased intangibles | 71 | 72 | 216 | 217 | |||
Segment Income (loss) | 2,194 | 1,607 | 6,804 | 2,869 | |||
Realized Investment Gains (Losses) | (21) | (141) | 833 | (1,069) | |||
Interest expense | 122 | 130 | 366 | 390 | |||
Income tax expense | 218 | 142 | 873 | 295 | |||
Net income (loss) | 1,833 | 1,194 | 6,398 | 1,115 | |||
Segment Reconciling Items | |||||||
Segment Reporting Information [Line Items] | |||||||
Net premiums written | 0 | 0 | 0 | 0 | |||
Net premiums earned | 0 | 0 | 0 | 0 | |||
Losses and loss expenses | (10) | 1 | (8) | (2) | |||
Policy benefits | (24) | 24 | (5) | 8 | |||
Policy acquisition costs | 0 | 0 | 0 | 0 | |||
Administrative expenses | 0 | 0 | 0 | 0 | |||
Underwriting income (loss) | 34 | (25) | 13 | (6) | |||
Net investment income (loss) | (55) | (32) | (135) | (64) | |||
Other (income) expense | (31) | [1] | (56) | (130) | (72) | ||
Amortization of purchased intangibles | 0 | 0 | 0 | 0 | |||
Segment Income (loss) | 10 | (1) | 8 | 2 | |||
Realized Investment Gains (Losses) | (10) | 1 | (8) | (2) | |||
Interest expense | 0 | 0 | 0 | 0 | |||
Income tax expense | 0 | 0 | 0 | 0 | |||
Net income (loss) | 0 | 0 | 0 | 0 | |||
North America Commercial P&C Insurance [Member] | |||||||
Segment Reporting Information [Line Items] | |||||||
Net premiums written | 4,369 | 3,778 | 12,318 | 10,750 | |||
Net premiums earned | 3,954 | 3,456 | 11,431 | 10,427 | |||
Losses and loss expenses | 2,754 | 2,444 | 7,740 | 8,123 | |||
Policy benefits | 0 | 0 | 0 | 0 | |||
Policy acquisition costs | 537 | 489 | 1,540 | 1,452 | |||
Administrative expenses | 273 | 243 | 772 | 751 | |||
Underwriting income (loss) | 390 | 280 | 1,379 | 101 | |||
Net investment income (loss) | 507 | 510 | 1,582 | 1,544 | |||
Other (income) expense | 8 | [1] | 7 | 24 | 19 | ||
Amortization of purchased intangibles | 0 | 0 | 0 | 0 | |||
Segment Income (loss) | 889 | 783 | 2,937 | 1,626 | |||
North America Personal P&C Insurance [Member] | |||||||
Segment Reporting Information [Line Items] | |||||||
Net premiums written | 1,300 | 1,285 | 3,761 | 3,719 | |||
Net premiums earned | 1,244 | 1,231 | 3,652 | 3,623 | |||
Losses and loss expenses | 846 | 961 | 2,341 | 2,406 | |||
Policy benefits | 0 | 0 | 0 | 0 | |||
Policy acquisition costs | 254 | 248 | 746 | 724 | |||
Administrative expenses | 73 | 65 | 200 | 199 | |||
Underwriting income (loss) | 71 | (43) | 365 | 294 | |||
Net investment income (loss) | 60 | 64 | 189 | 195 | |||
Other (income) expense | 1 | [1] | 1 | (3) | 4 | ||
Amortization of purchased intangibles | 2 | 2 | 8 | 8 | |||
Segment Income (loss) | 128 | 18 | 549 | 477 | |||
North America Agricultural Insurance [Member] | |||||||
Segment Reporting Information [Line Items] | |||||||
Net premiums written | 1,415 | 986 | 2,110 | 1,604 | |||
Net premiums earned | 1,338 | 971 | 1,858 | 1,441 | |||
Losses and loss expenses | 1,138 | 845 | 1,554 | 1,223 | |||
Policy benefits | 0 | 0 | 0 | 0 | |||
Policy acquisition costs | 61 | 56 | 100 | 96 | |||
Administrative expenses | 4 | 5 | 10 | 12 | |||
Underwriting income (loss) | 135 | 65 | 194 | 110 | |||
Net investment income (loss) | 6 | 7 | 21 | 23 | |||
Other (income) expense | 0 | [1] | 0 | 0 | 1 | ||
Amortization of purchased intangibles | 7 | 7 | 20 | 20 | |||
Segment Income (loss) | 134 | 65 | 195 | 112 | |||
Overseas General Insurance [Member] | |||||||
Segment Reporting Information [Line Items] | |||||||
Net premiums written | 2,596 | 2,238 | 7,983 | 6,857 | |||
Net premiums earned | 2,664 | 2,337 | 7,721 | 6,838 | |||
Losses and loss expenses | 1,487 | 1,192 | 3,936 | 3,935 | |||
Policy benefits | 0 | 0 | 0 | 0 | |||
Policy acquisition costs | 703 | 637 | 2,070 | 1,903 | |||
Administrative expenses | 266 | 260 | 811 | 759 | |||
Underwriting income (loss) | 208 | 248 | 904 | 241 | |||
Net investment income (loss) | 157 | 130 | 447 | 396 | |||
Other (income) expense | 0 | [1] | 1 | 3 | 10 | ||
Amortization of purchased intangibles | 11 | 10 | 36 | 33 | |||
Segment Income (loss) | 354 | 367 | 1,312 | 594 | |||
Global Reinsurance [Member] | |||||||
Segment Reporting Information [Line Items] | |||||||
Net premiums written | 221 | 181 | 702 | 606 | |||
Net premiums earned | 211 | 171 | 583 | 520 | |||
Losses and loss expenses | 192 | 154 | 422 | 314 | |||
Policy benefits | 0 | 0 | 0 | 0 | |||
Policy acquisition costs | 55 | 40 | 147 | 127 | |||
Administrative expenses | 9 | 9 | 27 | 28 | |||
Underwriting income (loss) | (45) | (32) | (13) | 51 | |||
Net investment income (loss) | 99 | 85 | 250 | 214 | |||
Other (income) expense | 0 | [1] | 0 | 0 | 1 | ||
Amortization of purchased intangibles | 0 | 0 | 0 | 0 | |||
Segment Income (loss) | 54 | 53 | 237 | 264 | |||
Life Insurance [Member] | |||||||
Segment Reporting Information [Line Items] | |||||||
Net premiums written | 609 | 610 | 1,844 | 1,874 | |||
Net premiums earned | 589 | 599 | 1,789 | 1,838 | |||
Losses and loss expenses | 179 | 183 | 562 | 556 | |||
Policy benefits | 175 | 174 | 508 | 542 | |||
Policy acquisition costs | 168 | 175 | 538 | 551 | |||
Administrative expenses | 82 | 80 | 247 | 238 | |||
Underwriting income (loss) | (15) | (13) | (66) | (49) | |||
Net investment income (loss) | 102 | 95 | 301 | 285 | |||
Other (income) expense | (19) | [1] | (23) | (79) | (52) | ||
Amortization of purchased intangibles | 2 | 1 | 4 | 3 | |||
Segment Income (loss) | 104 | 104 | 310 | 285 | |||
Corporate Segment [Member] | |||||||
Segment Reporting Information [Line Items] | |||||||
Net premiums written | 0 | 0 | 0 | 0 | |||
Net premiums earned | 0 | 0 | 0 | 0 | |||
Losses and loss expenses | 43 | 55 | 141 | 342 | |||
Policy benefits | 0 | 0 | 0 | 0 | |||
Policy acquisition costs | 0 | 0 | 0 | 0 | |||
Administrative expenses | 99 | 71 | 258 | 214 | |||
Underwriting income (loss) | (142) | (126) | (399) | (556) | |||
Net investment income (loss) | (10) | (19) | (42) | (65) | |||
Other (income) expense | (722) | [1] | (415) | (1,845) | (283) | ||
Amortization of purchased intangibles | 49 | 52 | 148 | 153 | |||
Segment Income (loss) | 521 | 218 | 1,256 | (491) | |||
Realized Investment Gains (Losses) | (11) | (142) | 841 | (1,067) | |||
Interest expense | 122 | 130 | 366 | 390 | |||
Income tax expense | 218 | 142 | 873 | 295 | |||
Net income (loss) | $ 170 | $ (196) | $ 858 | $ (2,243) | |||
|
Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
|
Earnings Per Share [Abstract] | ||||
Net income (loss) | $ 1,833 | $ 1,194 | $ 6,398 | $ 1,115 |
Weighted-average shares outstanding | 435,318,088 | 451,794,046 | 443,595,026 | 451,683,093 |
Share-based compensation plans | 3,123,550 | 1,471,434 | 3,032,989 | 1,894,699 |
Weighted-average shares outstanding and assumed conversions | 438,441,638 | 453,265,480 | 446,628,015 | 453,577,792 |
Basic earnings (loss) per share (US$ per share) | $ 4.21 | $ 2.64 | $ 14.42 | $ 2.47 |
Diluted earnings (loss) per share (US$ per share) | $ 4.18 | $ 2.63 | $ 14.33 | $ 2.46 |
Potential anti-dilutive share conversions | 1,758,853 | 7,053,316 | 1,439,882 | 6,767,727 |